INTERNATIONAL SOUND AND VIBRATION DIGEST (ISVD)
Published by THE INTERNATIONAL INSTITUTE OF ACOUSTICS AND VIBRATION (IIAV)
Volume 12, Number 1
Date: 10 February 2011
The information published in this digest has been submitted to ISVD from various
sources and does not necessarily reflect the opinion of the IIAV.
Editor-in-Chief: Malcolm J. Crocker, Auburn University, USA Managing Editor:
Margarita Maksotskaya, Auburn University, USA
Editorial Board
Jorge P. Arenas [Chile],
António P. O. Carvalho [Portugal]
Luis Bento Coelho [Portugal]
Tamer Elnady [Egypt]
Leonid Gelman [United Kingdom]
Samir Gerges [Brazil]
Barry Gibbs [United Kingdom]
Jeong-Guon Ih [South Korea]
Colin Hansen [Australia]
Robin Langley [United Kingdom]
Juri Lavrentjev [Estonia]
Marek Pawelczyk [Poland]
Brian Mace [United Kingdom]
Nuno Maia [Portugal]
Chris K. Mechefske [Canada]
Ricardo E. Musafir [Brazil]
Haisam Osman [United States]
Bert Roozen [Netherlands]
Andrew F. Seybert [United States]
Sergey V. Sorokin [Denmark]
Rupert M. Thornely-Taylor [United Kingdom] Jiri Tuma [Czech Republic]
Current number of subscribers: 21,137
To send a submission to the International Sound and Vibration Digest (ISVD)
please send your information by E-mail to mam0066@auburn.edu. In order to
unsubscribe please reply to this message with unsubscribe in the subject to
mam0066@auburn.edu.
TODAY\'S DIGEST CONTENTS
ITEM 1. INTRODUCTION.
ITEM 2. ICSV 18 CONGRESS: The Eighteenth International Congress on Sound and
Vibration, Rio-de-Janeiro, Brazil, 10 to 14 July 2011.
ITEM 3. CONFERENCE ANNOUNCEMENTS: 1) International Digital laboratory, Warwick
Manufacturing Group (WMG), University of Warwick Workshop, UK, March 29, 2011.
2) Alberta and Acoustics Noise Association (AANA) 2011 Spring Noise Conference,
the Province of Alberta, Canada, May 24, 2011; 3) First International Conference
on Cognitive Hearing Science for Communication, June 19-22, 2011, Linkoping,
Sweden; 4) 11th International Conference on Vibration Problems (ICOVP)September
5-8, Prague, Czech Republic; 5)7th annual COMSOL Conference October 13-15, 2011,
Boston, USA; 6)Fifth International Symposium on Temporal Design at University of
Sheffield, July 21-22, 2011, Sheffield, UK; 7) The Conference of the Australian
Acoustical Society Breaking New Ground November 2-4 2011, Holiday Inn, Surfers
Paradise, Queensland Australia.
ITEM 4. NATIONAL ACOUSTICAL LABORATORIES AND RESEARCH ACTIVITIES: 1) Studies on
human echolocation Cordoba Research and Transfer Center on Acoustics (CINTRA),
Cordoba, Argentina; 2) The research project Human response to vibration in
residential environment the University of Salford, UK; 3) Aeroacoustics Research
at the University Of Adelaide, Australia. 4) Vibration Analysis in Light
Synchrotrond. 5) NWAA Labs Seattle, Washington.
ITEM 5. NEW BOOK ANNOUNCEMENTS: 1) Command Generation for Dynamic Systems; 2)
Hilbert Transform Applications in Mechanical Vibration; 3) Introduction to
Finite Element Vibration Analysis Second Edition.
ITEM 6. RECENT DOCTORAL THESES: 1) Theoretical and experimental modal analysis
of nonlinear vibrating structures using nonlinear normal modes; 2) Tuning
methodology of nonlinear vibration absorbers coupled to nonlinear mechanical
systems
ITEM 7. HONORS AND AWARDS: 1) INCE/USA Announces the Leo Beranek Student Medal
for Excellence in the Study of Noise Control; 2) Matthew A. Davies, Ph.D.
Associate Professor of Mechanical Engineering: (1) Bank of America Teaching
Award Finalist;(2) Elected Fellow of the International Academy for Production
Engineering Research; 3) Marek Pawelczyk appointed as Honorary Ambassador for
Congresses of Poland.
ITEM 8. RESEARCH POSITION AVAILABLE: A Post-Doctoral research fellow in
acoustics/vibrations, School of Mechanical Engineering, University of Adelaide,
Australia.
ITEM 9. INDUSTRIAL NEWS. Marshall Day Acoustics releases North American version
of INSUL v6.4.
>>>
ITEM 10. NEW PATENT SPECIFICATION: Roundffusor1 (R1) - the complete acoustical
material R1.
ITEM 11. IIAV: MEMBERSHIP APPLICATION FORM
****************************************************************
ITEM 1. INTRODUCTION.
We are pleased to bring you the February 2011 issue of the INTERNATIONAL SOUND
AND VIBRATION DIGEST (ISVD). The DIGEST is now being published by the
INTERNATIONAL INSTITUTE OF ACOUSTICS AND VIBRATION (IIAV). The digest is free of
charge to members of the IIAV. Non-members may also receive the digest in future
if they log on at the IIAV website. The IIAV is a democratic international
scientific society. Membership, as member or associate is open to individuals
from all countries. In addition, 36 scientific societies and institutes have
become affiliated with the IIAV as cooperating organizations. On behalf of
Professor Hans Boden, KTH, Stockholm, Sweden, the President of the IIAV, and the
officers and directors, it is our pleasure to invite you to consider becoming a
member if you are not already. Members receive, as part of their annual dues of
$80 USD, not only the ISVD but also a refereed journal, the INTERNATIONAL
JOURNAL OF ACOUSTICS AND VIBRATION (IJAV) which began publication in December
1996. Members also receive each year the proceedings of the International
Congress on Sound and Vibration (ICSV). Non-IIAV members and libraries can
subscribe to the JOURNAL (IJAV) for $100 per year by airmail, post paid.
Complete details about IIAV are available on the worldwide web at http://www.iiav.org.
A membership application form is enclosed as ITEM 11 of this issue. It can be
submitted by e-mail, fax or airmail.The proceedings of the previous congresses
are available for a fee to non-members. If you are interested in further
information, please go to www.iiav.org or write to mam0066@auburn.edu.
We are pleased to inform you that back issues of the ISV Digest are available on
the IIAV website.
We hope that you are finding the INTERNATIONAL SOUND AND VIVRATION DIGEST
useful. We should be interested to hear your comments and to receive news items
and technical information and articles for inclusion in the next issue. We hope
to bring out the next issue of the DIGEST in April 2011, so do not forget to
send your news items soon! These should be sent to mam0066@auburn.edu.
Malcolm J. Crocker
Editor-in-Chief
Margarita Maksotskaya
Managing Editor
****************************************************************
ITEM 2. ICSV 18 CONGRESS: The Eighteenth International Congress on Sound and
Vibration, Rio-de-Janeiro, Brazil, 10 to 14 July 2011. More than 650 abstracts
have been submitted. The website will be open for correction to abstracts and
late submission until February 15, 2011. For more information and to correct or
submit an abstract please go to the ICSV 18 website: http://www.icsv18.org/
****************************************************************
ITEM 3. CONFERENCE ANNOUNCEMENTS:
1) International Digital laboratory, Warwick Manufacturing Group (WMG),
University of Warwick Workshop, UK March 29, 2011.
Engineering Integrity Society Technologies for Low Carbon Transportation in New
Sound Environments The Engineering Integrity Society The Engineering Integrity
Society is an independent not for profit organisation which aims to inspire
newly qualified engineers to embrace engineering as their chosen profession. The
Society is committed to promoting events and publications, providing a forum for
experienced and new engineers to discuss present industrial needs, new
technologies, and to stimulate both company and personal development. The annual
subscription rates are £25 for UK residents and £30 for non UK residents. Upon
joining the Society you will also have the additional advantages of;
preferential attendance rates at EIS events, together with selected events held
by some of the associated organisations. Access to archive CDs containing copies
of EIS presentations. Warwick Innovative Manufacturing Research Center (WIMRC)
Warwick Innovative Manufacturing Research Centre (WIMRC) was established at the
University of Warwick in 2001 to fund and manage adventurous, multi disciplinary
research relevant to the future needs of UK organisations competing in the
global marketplace. It is funded by the Engineering and Physical Sciences
Research Council (EPSRC) with supplementary support from industrial partners.
WIMRC carries out research that supports the UK manufacturing industry, focusing
on four key areas: Intelligent Vehicles; Eco Friendly Vehicles; Next Generation
Healthcare Technology; Next Generation Healthcare Management. For Further
Information please contact Lisa Mansfield by E-mail: lmansfield@e-i-s.org.uk
2) Alberta Acoustics and Noise Association (AANA) Spring Noise Conference in the
Province of Alberta, Canada, May 24, 2011.
The Alberta Acoustics and Noise Association will host workshops on the practical
understanding and application of noise regulations in the Province of Alberta on
May 24, 2011. These workshops begin at four day program including workshops,
technical sessions and plenary speakers providing a forum for facility
representatives to practiced acoustical consultants, to engage in discussions on
noise control and regulation. The Spring Noise Conference is unique in its
approach to present noise as a practical and applied topic for industry,
acoustical specialists and practitioners alike and is the only conference in
Canada to do so. Since its inception in 1993 the Spring Noise conference has
grown from a local event initiated by the ERCB to a global conference that
attracts attendees and speakers from around the world. Conference participants
share experiences and innovations in environmental and occupational noise, sound
measurement, regulation and control. This year plenary speakers specialties
include wind turbine noise, low frequency noise, drilling noise, environmental
noise regulation, noise control technologies, acoustical ecology and industrial
hygiene. The 2011 Spring Noise Conference runs from May 24th-27th, 2011 at the
Fairmont Banff Springs Hotel. Please visit www.springnoiseconference.com For
more information please contact:
Robin Himes: medialiaison@springnoiseconference.com
Alberta Acoustics & Noise Association
3) First International Conference on Cognitive Hearing Science for
Communication, Linkoping, Sweden, June 19-22, 2011.
Researchers in all fields, basic and applied, who are interested in the
interplay between cognitive and hearing factors in communication, are welcome to
attend. When the language input is degraded (due to challenging conditions,
sensory impairment, or processing applied by hearing aids or implants), the
quality of the \'bottom-up\' signal may not be sufficient to yield accurate
perception, and the individual may rely on a variety of compensatory top down
processes, based on cognitive abilities, and on knowledge and experience, to
optimize understanding. Increased perceptual processing demands may also tax
higher-level cognitive processing. The goal of this meeting is to describe, for
persons with and without hearing impairment and for the profoundly deaf, how
cognitive and compensatory factors interact with processing of the \'bottom-up\'
signal in communication, and how this may change over the lifespan. The
conference will include invited speakers and open poster sessions. Further
information can be obtained from: http://eventus.trippus.se/head2011attendees.
The conference is organized through the Linnaeus Center for Hearing and Deafness
(Linnaeus HEAD), funded by a 10-year Linnaeus Grant from the Swedish Research
Council (Vetenskapsradet)
http://www.ibl.liu.se/cdd/ihv/linnecentrum-head/om-linnecentrum-head?l=en
4) 11th International Conference on Vibration Problems (ICOVP) Prague, Czech
Republic, September 5-8, 2011.
The Permanent Committee of International Conference on Vibration Problems (ICOVP)
and the Technical University of Liberec are pleased to announce the 10th
biennial International Conference on Vibration Problems (ICOVP) 2011 to be held
in Prague, Czech Republic, from 5 to 8 September, 2011. ICOVP-2011 aims to bring
together scientists with different backgrounds who are actively engaged and
working on vibration-related problems in all engineering disciplines, both in
theoretical and applied fields. For more information, please visit: http://www.icovp.org/.
5) 7th annual COMSOL Conference October 13-15, 2011, Boston, USA.
The 7th annual COMSOL Conference 2011 will take place on October 13-15 2011 at
the Boston Newton Marriott Newton, MA. The COMSOL Group provides software
solutions for multiphysics modeling. We are a fast growing high tech engineering
Software Company with a proven track record and a vision as a future leader of
the industry. The company was founded in July 1986 in Stockholm, Sweden. We have
grown to include offices in Denmark, Finland, France, Germany, the Netherlands,
Norway, India, Italy, Switzerland, the United Kingdom, and the U.S.A. Conference
Highlights include: User Presentations and Minicourses; Keynote Talks; Poster
Session; Exhibition; Networking. Further Information and abstract submission can
be sent to the COMSOL Conference 2011 website:
http://www.comsol.com/conference2011/usa/
6) Fifth International Symposium on Temporal Design at University of Sheffield,
Sheffield, UK, July 21-22, 2011.
Description: A joint event organized by the School of Architecture, University
of Sheffield with the Institute of Acoustics. Topics will include: architecture,
building and environmental acoustics; music and music space soundscape sound
quality; auditory system noise and vibration measurement and evaluation;
environmental psychology and physiology; built environmental design including
visual, heat and indoor air environments. More information can be found at:
http://www.ioa.org.uk/events/event.asp?id=104
7) The Conference of the Australian Acoustical Society Breaking New Ground,
Holiday Inn, Surfers Paradise, Queensland Australia, November 2-4 2011.
Conference of the Australian Acoustical Society Breaking New Ground November 2-4
2011. The Australian Acoustical Society Conference 2011 will be held between the
2nd and 4th of November 2011 at the Holiday Inn in the heart of Australia’s
favorite holiday destination on the Gold Coast, Queensland. The conference
theme, Breaking New Ground, is based on the recent boom in large infrastructure
projects. Major infrastructure for transportation, industry and mining present
challenges in noise and vibration, whether these are in assessment, modeling or
mitigation or in the need to provide appropriate legislative and regulatory
frameworks. This conference will break new ground as delegates review recent
developments and address the challenges and opportunities presented by the
construction and operational phases of such infrastructure. Other major topics
for the Conference will include Underwater Acoustics and Architectural and
Building Acoustics. However, papers from all areas of acoustics are welcomed.
For further details for the conference theme and other topics of interest for
the Conference of the Australian Acoustical Society go to: http://www.mech.uq.edu.au/acoustics2011/Overview.htm
****************************************************************
ITEM 4. NATIONAL ACOUSTICAL LABORATORIES AND RESEARCH ACTIVITIES:
1) Studies on human echolocation in the Research and Transfer Center on
Acoustics (CINTRA), Cordoba, Argentina.
The main aim of one of the interdisciplinary research lines from the CINTRA ―National
Technological University(UTN) and Associated Unity of the National Scientific
and Technical Research Council (CONICET) ― is the study of human echolocation
at short distances. This ability may be used daily by human beings, even without
being conscious of it. It turns out to be crucial for the achievement of the
efficient independent mobility of blind persons, an aspect that is severely
affected by blindness. It implies the use of self-generated sounds (original or
direct signal) with the specific purpose of obtaining auditory information
(reflected signals) to locate and recognize unseen silent objects. According to
the new cognitive and ecological paradigms in perception, it is believed that
the primary function of the auditory system is to determinate, i.e., to localize
and recognize, the characteristics of the sound source through the sounds
emitted by it. Within this context, it has been very recently argued that
echolocation is a variant of that general process.
Two recently established scientific paradigms have specially enriched the study
of this amazing ability: the sensory-motor contingency theory and the sensory
substitution perspective. The first approach claims that the perceptual and
motor systems are coupled processes that demand a thoroughly unified treatment.
The second approach considers that, for example, vision loss does not mean loss
of the ability to see since it is possible to see with the ears or the skin. The
central idea is that the information usually captured by vision may instead be
captured by touch or audition, on account of brain plasticity. Our research
group on human echolocation was formed more than 25 years ago, and it is led by
Dr. Claudia Arias. The research groups are composed of the following
interdisciplinary staff members: Mercedes Hug (psychologist), Aldo Ortiz Skarp
(systems analyst), Fernando Bermejo (psychologist), Nicolas Venturelli
(philosopher), Diana Rabinovich (philosopher), Facundo Barrera (advanced student
of electronic engineering), Valentin Lunati (advanced student of electronic
engineering) and Carolina Nassif (advanced student of psychology).
Currently, three projects ―granted by CONICET, the National University of
Cordoba (UNC) and the UTN are being carried out whose main aims are: To
characterize head movements in participants with and without sensory handicap
(blindness and unilateral deafness) in three auditory tests without visual cues:
direct and reflected sounds, localization tests and an echolocation test of real
silent objects; To determine developmental aspects of sound localization and
related auditory phenomena in sighted and blind infants and their possible
implications on the human echolocation ability (PhD project finished); To
characterize the structuring processes of auditory space perception without
visual cues in adults with and without visual impairment equipped with natural
and artificial sensory substitution systems or assisted with specific computer
games (current PhD project).
Contact e-mail address: carias@scdt.frc.utn.edu.ar
2) The research project Human response to vibration in residential environment
the University of Salford, UK.
The research project Human response to vibration in residential environment
funded by the UK Department for Environment, Food and Rural Affairs (DEFRA) will
reach completion in March 2011. The research was carried out by the University
of Salford, UK with guidance from an expert panel including Colin Grimwood
(Bureau Veritas), Henk Miedema and Sabine Janssen (TNO), Richard Perkins,
(Parsons Brinckerhoff), Colin Stanworth (BSI), and Rupert Thornely-Taylor
(Rupert Taylor Ltd). This work will be of interest to acoustical consultants and
environmental health officers involved in the assessment of vibration
complaints, as well as to planners and practitioners involved in the design of
buildings. The objective of the study has been to demonstrate a robust
relationship between vibration exposure and human response (i.e. annoyance
levels), to ultimately provide a reliable basis for the development of standards
and guidance when assessing vibration in residential buildings. The project has
considered vibration sources that are outside the control of residents, such as
construction, road and rail activities. In addition, noise is also a
consideration as it is a frequent companion to vibration exposure. The protocol
involved the measurement of vibration outside and inside individual residences
and a social study questionnaire based on face-to-face interviews with
householders, with a final total of approximately 1500 case studies obtained.
This project completes a total of seven years research funded by DEFRA aimed at
developing exposure-response relationships to vibration and noise in residential
environments. The final report will consist of a short project report and a
number of technical reports. The detailed technical reports will address the
measurement of vibration exposure, the measurement of response, the calculation
of vibration exposure, the measurement and calculation of noise exposure, the
results and analysis of response data, and the determination and analysis of
exposure-response relationship. The report is expected to be published in Summer
2011. [Work funded by the Department for Environment, Food and Rural Affairs (DEFRA)
UK].
3)Aeroacoustics Research at the University of Adelaide, Australia.
The University of Adelaide has recently been developing a research program in
aeroacoustics/flow induced noise. There are several experimental and numerical
projects underway, funded by the Australian Research Council, the Australian
Defense Science and Technology Organisation (DSTO) and Industry. A summary of
these projects is given below.
The Mechanics of Quiet Airfoils: This is a fundamental investigation of how
turbulent flow creates noise at the trailing edge of an airfoil. Experiments,
involving a range of airfoil shapes, are being conducted in the University
anechoic wind tunnel.
Recent results are providing important insight and new results concerning the
production of trailing edge noise at low-to-moderate Reynolds number. The
project is also developing numerical methods to predict trailing edge noise and
will use these models in an aeroacoustic shape optimisation methodology. RANS
based Statistical Noise Method (RSNM). This project is developing a new
prediction methodology for airfoil and bluff body sound generation. Its aim is
to have an accurate yet efficient method of sound generation based on RANS CFD
solutions to make aeroacoustic problems tractable by industry and designers.
Understanding and predicting submarine hydrofoil noise. This is a collaborative
project between Deep Blue Tech (DBT), the Defense Science and Technology
Organisation (DSTO) and the University of Adelaide. Its aim is to develop a much
better understanding of hydrofoil self noise through experiment and numerical
simulation.
Flow-Induced-Noise Generated by Wall-Mounted Cylinders. This fundamental project
(supported by DSTO) is looking at the flow and noise generated by wall mounted
cylinders. Such situations occur on the hull of submarines, fuselage of aircraft
and external surfaces of automobiles.
The effect of a detached plate on the sound generated by a bluff body in cross
flow. This project is investigating, by numerical direct numerical simulation,
the effect of wake interference on the production of sound by bluff bodies.
Results show that noise can be reduced or intensified, depending on the type of
wake interference. Work is progressing towards developing an optimal size and
position of a detached plate to achieve minimum radiated noise. The person
leading this work is Dr Con Doolan con.doolan@adelaide.edu.au. Other researchers
that are part of the team include Dr Laura Brooks, Professor Colin Hansen, Dr
Danielle Moreau and Associate Prof Anthony Zander plus a number of outstanding
graduate students.
4) Vibration Analysis in Light Synchrotrond.
MAX-lab is a national laboratory operated jointly by the Swedish Research
Council and Lund University. Nowadays, the MAX project consists of three
facilities, (three storage rings): MAX-I, MAX-II, MAX-III and one electron
pre-accelerator called MAX-Injector. New methods are needed in order to improve
analysis of different materials, and so is a new storage ring due to improved
nanotechnology. Thus, MAX IV will be 100 times more efficient than already
existing synchrotron radiation facilities becoming a world leading facility for
studies of particles at a nano-level by using synchrotron light.
Division of Acoustics Engineering, Lund University, John Ericsson vag 1, 22100
Lund, Sweden, e-mail:
delphine.bard@acoustics.lth.se.
5) NWAA Labs Seattle, Washington.
NWAA Labs is an independent laboratory providing uniform loudspeaker testing and
material testing to the audio, acoustics, and construction industries. NWAA Labs
has the ability to do MACH Testing and high SPL testing of these items to meet
or exceed ISO and ASTM standards. Ron Sauro, the president of NWAA Labs,
recently signed a four-year lease with the Satsop Development Park for his part
of the reactor building. At a height equal to 16 stories – several of them
underground the reactor building is a somewhat dwarfed by the cooling towers but
is an excellent place to conduct experiments of all kinds. Sauro company, NWAA
Labs, tests the sound absorption and transmission properties of building
materials such as windows, doors and acoustical materials used in wall
structures, ceilings and floors. He also tests sound equipment such as speakers
to see how they project sound. Inside the reactor building Sauro has created a
temporary, proof of concept two-room acoustical reverberation and transmission
loss suite that is thought to be one of the largest in the world. No one
actually works in the rooms. The materials are set in place for testing and
later removed. Testing is monitored from a nearby control room. The send room or
small reverberation chamber is 23 and half feet high by 35 feet by 30 feet with
walls built of 1-foot thick concrete. The receive room also known as the main
reverberation chamber, is 17 and half feet high by 42 feet by 35 feet,
surrounded by walls that are 3-feet thick.
Sauro is presently creating another test room this one an anechoic chamber. Once
that is complete, Sauro has plans for building his real reverberation sound lab
while he continues to use the temporary proof of concept lab to test materials.
The real lab will be 28 feet by 45 feet by 80 feet and be able to test curtain
walls used as sound breaks in skyscrapers.
Contact information: Ron Sauro: audioron@msn.com; http://www.nwaalabs.com/
****************************************************************
ITEM 5. NEW BOOK ANNOUNCEMENTS:
1) Command Generation for Dynamic Systems by By William Singhose, Warren Seering
Perfect-bound Paperback: 159 pages
Publisher: William Singhose (January 17, 2011)
ISBN: 978-0-9842210-0-4
Price: 52.55 USD
Command Generation for Dynamic Systems presents techniques for moving machines
very rapidly. The main focus is on intelligently designing the reference command
that is used to drive the system. Numerous example systems, such as cranes,
robots, and satellites are discussed.
2) Hilbert Transform Applications in Mechanical Vibration by Michael Feldman
Hardcover: 304 pages
Publisher: Wiley (May 2011)
ISBN: 978-0-470-97827-6
Price: 135.00 USD
Hilbert Transform Applications in Mechanical Vibration addresses recent advances
in theory and applications of the Hilbert transform to vibration engineering,
enabling laboratory dynamic tests to be performed more rapidly and accurately.
The author integrates important pioneering developments in signal processing and
mathematical models with typical properties of mechanical dynamic constructions
such as resonance, nonlinear stiffness and damping. A comprehensive account of
the main applications is provided, covering dynamic testing and the extraction
of the modal parameters of nonlinear vibration systems, including the initial
elastic and damping force characteristics. This unique merger of technical
properties and digital signal processing allows the instant solution of a
variety of engineering problems and the in-depth exploration of the physics of
vibration by analysis, identification and simulation. This book will appeal to
both professionals and students working in mechanical, aerospace, and civil
engineering, as well as naval architecture, biomechanics, robotics, and
mechatronics.
3) Introduction to Finite Element Vibration Analysis. Second Edition by Maurice
Petyt.
Hardcover: 516 pages
Publisher: Cambridge University Press; second edition (September 2010)
ISBN: 9780511910982
Price: 112.00 USD
Introduction to Finite Element Vibration Analysis Second Edition by Maurice
Petyt presents an introduction to the mathematical basis of finite element
analysis as applied to vibrating systems. This second edition includes
information on the many developments that have taken place over the last 20
years. Existing chapters have been expanded, where necessary, and three new
chapters have been included that discuss the vibration of shells and
multilayered elements and provide an introduction to the hierarchical finite
element method. This is an introduction to the mathematical basis of finite
element analysis as applied to vibrating systems. Finite element analysis is a
technique that is very important in modeling the response of structures to
dynamic loads. Although this book assumes no previous knowledge of finite
element methods, those who do have knowledge will still find the book to be
useful. It can be utilized by aeronautical, civil, mechanical, and structural
engineers as well as naval architects. This second edition includes information
on the many developments that have taken place over the last twenty years.
Existing chapters have been expanded where necessary, and three new chapters
have been included that discuss the vibration of shells and multi-layered
elements and provide an introduction to the hierarchical finite element method.
****************************************************************
ITEM 6. RECENT DOCTORAL THESES:
1) Theoretical and experimental modal analysis of nonlinear vibrating structures
using nonlinear normal modes;
November 2010
Maxime Peeters, Ir.
Structural Dynamics Research Group
Aerospace and Mechanical Engineering Department
University of Liege
Chemin des chevreuils, 1
4000 Liege
Belgium
Email: m.peeters@ulg.ac.be
Abstract:
Theoretical and experimental modal analysis, i.e., the computation of vibration
modes from a mathematical model and from experimental data, respectively, is
quite sophisticated and advanced in linear structural dynamics. However,
nonlinearity is a frequent occurrence in real-world engineering structures, and
the existing linear methodologies fail dramatically in the presence of nonlinear
dynamical phenomena. Therefore, the present thesis focuses on the development of
a practical nonlinear analog of modal analysis for properly accounting for
nonlinearity in mechanical systems. The concept of nonlinear normal mode (NNM)
provides solid mathematical and theoretical foundations for a rigorous, yet
understandable by the practicing engineer, analysis of nonlinear dynamical
behaviors. In this context, a useful framework for nonlinear modal analysis of
vibrating structures, which includes the computation of NNMs from finite element
models and their identification from experimental data, is proposed in this
dissertation. In view of the still limited use of NNMs in structural dynamics,
special attention is devoted to progress toward a practical tool that has the
potential to deal with large-scale, real-world structures. Targeting an
effective and exact computation of NNMs, even in strongly nonlinear regimes of
motion, one original contribution of this work is to resort to numerical
methods. An algorithm combining a shooting procedure and the so-called pseudo-arclength
continuation method is developed. On the other hand, a nonlinear extension of
phase resonance testing (also known as force appropriation) is introduced for
the experimental identification of NNMs, which is another innovative aspect of
the doctoral thesis. In particular, the phase lag quadrature criterion, which is
used for linear experimental modal analysis is generalized in the presence of
nonlinear dynamical behavior. Academic examples are first considered to
illustrate, in a simple manner, that the proposed methods form an effective and
adequate framework for nonlinear modal analysis. Furthermore, more realistic
structures, including a full-scale aircraft, are studied to demonstrate the
potential applicability of the approach to large-scale, real-life applications.
2) Tuning methodology of nonlinear vibration absorbers coupled to nonlinear
mechanical systems.
September 2010
Regis Viguie, Ir.
Structural Dynamics Research Group
Aerospace and Mechanical Engineering Department
University of Liege
Chemin des chevreuils, 1
4000 Liege
Belgium
Email: r.viguie@ulg.ac.be
Email: regis.viguie@gmail.com
Abstract:
A large body of literature exists regarding linear and nonlinear dynamic
absorbers, but the vast majority of it deals with linear primary structures.
However, nonlinearity is a frequency occurrence in engineering applications.
Therefore, the present thesis focuses on the mitigation of vibrations of
nonlinear primary systems using nonlinear dynamic absorbers. Because most
existing contributions about their design rely on optimization and sensitivity
analysis procedures, which are computationally demanding, or on analytic
methods, which may be limited to small-amplitude motions, this thesis sets the
emphasis on a tuning procedure of nonlinear vibration absorbers that can be
computationally tractable and treat strongly nonlinear regimes of motion. The
proposed methodology is a two-step procedure relying on a frequency-energy based
approach followed by a bifurcation analysis. The first step, carried out in the
free vibration case, imposes the absorber to possess a qualitatively similar
dependence on energy as the primary system. This gives rise to an optimal
nonlinear functional form and an initial set of absorber parameters. Based upon
these initial results, the second step, carried out in the forced vibration
case, exploits the relevant information contained within the nonlinear frequency
response functions, namely, the bifurcation points. Their tracking in parameter
space enables the adjustment of the design parameter values to reach a suitable
tuning of the absorber. The use of the resulting integrated tuning methodology
on nonlinear vibration absorbers coupled to systems with nonlinear damping is
then investigated. The objective lies in determining an appropriate functional
form for the absorber so that the limit cycle oscillation suppression is
maximized. Finally, the proposed tuning methodology of nonlinear vibration
absorbers may impose the use of complicated nonlinear functional forms whose
practical realization, using mechanical elements, may be difficult. In this
context, an electro-mechanical nonlinear vibration absorber relying on
piezoelectric shunting possesses attractive features as various functional forms
for the absorber nonlinearity can be achieved through proper circuit design. The
foundation of this new approach is laid down and the perspectives are discussed.
3) Experimental Modal Analysis using Blind Source Separation Techniques.
May 2010
Fabien Poncelet
Dynamic Research Group
Aerospace and Mechanical Engineering Department
University of Liege
Chemin des chevreuils, 1
4000 Liege
Belgium
Email: fponcelet@ulg.ac.be
Abstract:
This dissertation deals with dynamics of engineering structures and principally
discusses the identification of the modal parameters (i.e., natural frequencies,
damping ratios and vibration modes) using output-only information, the
excitation sources being considered as unknown and immeasurable. To solve these
kinds of problems, a quite large selection of techniques is available in the
scientific literature, each of them possessing its own features, advantages and
limitations. One common limitation of most of the methods concerns the
post-processing procedures that have proved to be delicate and time consuming in
some cases, and usually require good user expertise. The constant concern of
this work is thus the simplification of the result interpretation in order to
minimize the influence of this ungovernable parameter. A new modal parameter
estimation approach is developed in this work. The proposed methodology is based
on the so-called Blind Source Separation techniques that aim at reducing large
data set to reveal its essential structure. The theoretical developments
demonstrate a one-to-one relationship between the so-called mixing matrix and
the vibration modes. Two separation algorithms, namely the Independent Component
Analysis and the Second-Order Blind Identification, are considered. Their
performances are compared, and, due to intrinsic features, one of them is
finally identified as more suitable for modal identification problems. For the
purpose of comparison, numerous academic case studies are considered to evaluate
the influence of parameters such as damping, noise and nondeterministic
excitations. Finally, realistic examples dealing with a large number of active
modes, typical impact hammer modal testing and operational testing conditions,
are studied to demonstrate the applicability of the proposed methodology for
practical applications.
****************************************************************
ITEM 7. HONOURS AND AWARDS:
1) INCE/USA Announces the Leo Beranek Student Medal for Excellence in the Study
of Noise Control. This special Medal was established by the Board of Directors
of INCE/USA on October 24, 2010 to recognize excellence in the study of
noise-control by undergraduate and graduate students at academic institutions in
North America that have courses in, or related to, noise-control engineering
including practical applications.
2) Matthew A. Davies, (1) Bank of America Teaching Award Finalist;(2) Elected
Fellow of the International Academy for Production Engineering Research;
Matthew A. Davies, Ph.D. | Associate Professor of Mechanical Engineering
UNC Charlotte | 232 Duke Centennial Hall
9201 University City Blvd. | Charlotte, NC 28223
Email: MADAVIES@uncc.edu
(1) Bank of America Teaching Award Finalist
(2) Elected Fellow of the International Academy for Production Engineering
Research
(3) Recent Grants
a. High speed micro-milling of optical devices for infra-red beam shaping and
imaging, II-VI Foundation, http://ii-vifoundation.com/
b. Fabrication of Multi-scale Optics through Free-Form Micromachining:
Hierarchical Manufacturing across Seven Orders of Magnitude
3) Marek Pawelczyk has been appointed as \"Honorary Ambassador of Congresses for
Poland\". Marek Pawelczyk:
Marek.Pawelczyk@polsl.pl
****************************************************************
ITEM 8. RESEARCH POSITION AVAILABLE:
A Post-Doctoral research fellow in acoustics/vibrations, The School of
Mechanical Engineering, the University of Adelaide, Australia.
The School of Mechanical Engineering is currently seeking a Research Associate
to participate in an Australian Research Council funded linkage project with the
company Trackside Intelligence Pty Ltd (TrackIQ), to further develop their
trackside system for monitoring the condition of wheel bearings on railway
rolling stock. The current system uses an advanced microphone array, ancillary
sensors and sophisticated signal processing to diagnose bearing faults in
freight trains as they pass a monitoring station at normal operational speed.
Other monitoring products use arrays of load cells and accelerometers to detect
wheel defects in underway rail vehicles. TrackIQ has more than 100 systems
installed on railway lines in nine countries.This ARC funded project involves
laboratory tests, field trials in Australia & overseas, and the development of
analytical models to underpin the further development of the technology and its
extension to other, more complex types of operational rail vehicles, with goals
of reduced maintenance costs and increased operational safety. The project has
the support of large Australian and international rail transport companies.
We are seeking a Research Associate with a PhD in acoustics, vibration, signal
processing or a related discipline to participate in this project, for its
duration of three years. A skills mix spanning use of multi-channel measurement
systems and advanced analytical methods, is required. Salary: (Research
Associate, Level B) $76,157 per annum, plus attractive superannuation benefits.
Further information, including selection criteria may be obtained from
Dr. Carl Howard. The position is expected to commence in May or June, 2011.
SCHOOL OF MECHANICAL ENGINEERING
THE UNIVERSITY OF ADELAIDE SA 5005
TELEPHONE +61 8 8303 5460
FACSIMILE +61 8 8303 4367
Email: carl.howard@adelaide.edu.au
http://www.mecheng.adelaide.edu.au/
****************************************************************
ITEM 9. INDUSTRIAL NEWS.
1)Marshall Day Acoustics releases the North American version of INSUL v6.4.
Marshall Day Acoustics has released the North American version of INSUL v6.4.
The new version includes a number of developments that are particularly
interesting for North American acoustics professionals. The new software
includes an impact sound for light weight timber floors, sandwich panels with
polystyrene or rockwool core panels, porous material TL, improved profiled steel
and aluminum panel predictions.
A trial version of INSUL 6.4 can be downloaded from the following hyperlink:
www.navcon.com/insulsoftware.htm<http://www.navcon.com/insulsoftware.htm> The
current download will automatically activate a INSUL trial version through
February 13, 2011. After that please send an email to webinfo@navcon.com<mailto:webinfo@navcon.com>
requesting a trial license file.
Navcon Engineering Network - Noise & Vibration Consultants
Sender: Hans Forschner, Sr. Acoustical Engineer
Address 701 West Las Palmas Dr., Fullerton, CA 92835
Phone: 714-441-3488
Web Site: www.navcon.com<blocked::http://www.navcon.com/>
E-mail: forschner@navcon.com<blocked::mailto:forschner@navcon.com>
2) BYD (Build Your Dreams) - Chinese automotive manufacturer has chosen IAC to
provide a range of state of the art anechoic chambers and quiet rooms for
testing new vehicles prior to production. The project is being co-ordinate by
the UK and Chinese offices.
3)IAC Colpro have acquired Sound Attenuators Australia and Acoustic Systems -
IAC Colpro acquired both companies in late 2010 extending their range of
available markets and building on the already successful business in the mining
sector. Both Sound Attenuators Australia and Acoustic Systems were providers of
noise control solutions for building services.
4) IAC UK has Provided Head of Stand Cabins to British Airways (BA) -IAC
product, the Fli-Pod has received compliments from praise BA as a cost effective
solution to improving the efficiency of ground staff working with in and
outbound aircraft. The Fli-Pod is a bespoke acoustically controlled environment,
meaning that ground staff can work in peace and tranquility whist remaining very
close to the aircraft, saving time and money.
Additional information can also be obtained from:
http://www.industrialacoustics.com/uk/news/index.asp
ITEM 10. NEW PATENT SPECIFICATION.
An Invention - United States Patent Nr.:7261182 / 2007 and European Patent Nr.:
1506541 /2010: Roundffusor1 (R1) - the complete acoustical material R1 is an
active and clean sound diffuser (from around 180-250Hz to 20.000 Hz) & adaptable
low frequency absorber (5 - 250 Hz).The present invention relates to an
acoustical diffuser device, said apparatus comprising two lateral rigid
supports, mounted to the inside of the said diffuser which lateral supports are
received, like a drawer , by two wooden rails, section \"T\". The two wooden
rails \"T\" are simply mounted on the wall surface with screws or nails. The
main diffuser body with his two drivers is mounted just like a drawer toward the
two rails T. The main body is composed from three basically 3D shapes. Each
fourth diffusers, displays together a new 3D shapes at their nearest point. The
angle between each 3D shape, including the new common shape and his neighbor
shapes is the same. From the total surface of each diffuser there is more than
90 % diffusing surface. Except the wooden rails, section \"T\", the complex
diffuser body and his lateral supports are fabricated from hard impact
polystyrene or any material suitable for the device geometry using vacuum
thermoforming, injection molding, blow molding facilities or any other suitable
way, keeping the same device geometry, the lateral supports being added with
adhesives or produced from the same material as one piece with the diffuser
device main body.
For further information please contact Mr. Zainea Liviu: liviu@zainea.com or
visit: www.zainea.com
****************************************************************
ITEM 11. IIAV: Membership Application Form for the INTERNATIONAL INSTITUTE OF
ACOUSTICS AND VIBRATION (IIAV)
President: Hans Boden, [Sweden]
Vice Presidents: Marek Pawelczyk,[Poland]
Eleonora Carletti,[Italy]
Secretary: Semyung Wang, [South Korea]
Treasurer: Zhuang Li, [United States of America]
Executive Director: Malcolm Crocker, [United States of America].
The International Institute of Acoustics and Vibration (IIAV) incorporated in
June 1995, is a non-profit scientific society whose membership is open to
qualified individuals in all countries.
PURPOSE The Institute has been created to advance the science of acoustics and
vibration by creating an international scientific society that is responsive to
the needs of scientists and engineers in all countries whose primary interests
are in the fields of acoustics and vibration. The Institute shall cooperate with
scientific societies in all countries and with other international organizations
with the aim of increasing information exchange by sponsoring, cosponsoring or
supporting seminars, workshops, congresses and publishing or providing journals
or other publications. The Institute will provide an electronic International
Sound and Vibration Digest (ISVD) and a paper refereed journal (the
International Journal of Acoustics and Vibration) for all members as part of
their dues.
MEMBERSHIP There are six classifications of membership in the Institute
including: Fellow, Member, Associate, Student Member, Emeritus Member, and
Honorary Fellow. All memberships entitle a member to receive the publications of
the Institute and to attend Institute meetings. Those entitled to vote at
Institute meetings are restricted to Fellows, Members and Emeritus Members.
Fellows, Members, Emeritus Members and Honorary Fellows are eligible to hold
office. Membership as Member is open to all those who have at least a
baccalaureate degree or its equivalent from an accredited institution and who
are employed or have been employed in an activity related to acoustics and/or
vibration. Membership as Associate is open to all persons who wish to support
and promote the activities of the Institute, but who do not meet the criteria
for membership as Member.
DUES The membership dues are $80 per year. Membership dues for those from some
countries will be at a lower rate. Members will begin receiving the electronic
ISVD and the journal immediately on joining the Institute.
OFFICERS AND DIRECTORS The officers of the Institute are the President, the
President-Elect, the Immediate Past President, the Vice President for
Professional Relations, the Vice President for Communications, the Secretary and
Treasurer. The President, President-Elect and Immediate Past President hold
office for two years. The other officers hold office for four years. The
directors of the Institute hold office for four years. The officers and
directors are elected by the members of the Institute.
COOPERATING SCIENTIFIC SOCIETIES The Institute recognizes that many scientific
societies with interests in acoustics and/or vibration exist in different
countries. It is the purpose of the Institute to supplement their activities and
to cooperate with them for the good of scientists and engineers throughout the
world. To that end, existing scientific societies will be encouraged to become
affiliated with the Institute as cooperating member societies.
IIAV MEMBERSHIP APPLICATION FORM
If you are interested in joining the IIAV, please fill in the form and return It
by fax or e-mail (see following).
Malcolm J. Crocker
Executive Director
Mechanical Engineering Department
270 Ross Hall
Auburn University
Auburn, AL 36849, USA
Fax 334-844-3306
crockmj@auburn.edu
mam0066@auburn.edu
----------------------------------------------------------------
Application form: ( ) Member ( ) Associate
1) Name: _____________________________________________________
2) Address: ____________________________________________________________
Fax: _____________________ E-mail: ____________________________
3) Degrees (Institutions and dates):
_____________________________________________________________________________
4) Employment (with dates):
________________________________________________________________
5) Signature & Date: _______________________________________________________
****************************************************************
END