Special Course on Acoustic Wave Propagation

Special Course on Acoustic Wave Propagation
A Book

by Anonim

  • Publisher : Unknown Publisher
  • Release : 1979
  • Pages : 234
  • ISBN : 9876543210XXX
  • Language : En, Es, Fr & De
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Computational Acoustics of Noise Propagation in Fluids - Finite and Boundary Element Methods

Computational Acoustics of Noise Propagation in Fluids - Finite and Boundary Element Methods
A Book

by Steffen Marburg,Bodo Nolte

  • Publisher : Springer Science & Business Media
  • Release : 2008-02-27
  • Pages : 578
  • ISBN : 9783540774488
  • Language : En, Es, Fr & De
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The book provides a survey of numerical methods for acoustics, namely the finite element method (FEM) and the boundary element method (BEM). It is the first book summarizing FEM and BEM (and optimization) for acoustics. The book shows that both methods can be effectively used for many other cases, FEM even for open domains and BEM for closed ones. Emphasis of the book is put on numerical aspects and on treatment of the exterior problem in acoustics, i.e. noise radiation.

The Time-Explicit Nodal Discontinuous Galerkin Method Applied to Acoustic-Structure Interaction Problems

The Time-Explicit Nodal Discontinuous Galerkin Method Applied to Acoustic-Structure Interaction Problems
A Book

by Kirill Shaposhnikov,Mads J. Herring Jensen,Elin Svensson

  • Publisher : Unknown Publisher
  • Release : 2019
  • Pages : 329
  • ISBN : 9876543210XXX
  • Language : En, Es, Fr & De
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Acoustic Breakout Noise From Non-Circular Muffler Shells

Acoustic Breakout Noise From Non-Circular Muffler Shells
A Book

by SH Gowtham Gudimella

  • Publisher : CSMFL Publications
  • Release : 2018-04-02
  • Pages : 111
  • ISBN : 8193278461
  • Language : En, Es, Fr & De
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A theoretical treatment of sound transmission through the walls of non-circular muffler shell is done for plane mode transmission within the muffler shell. Non-circular muffler shells include distorted circular (due to the welding seam), elliptical (oval) and flat-oval shells. An analytical formulation has been developed in this thesis in order to predict the breakout noise with the acoustical and structural wave coupling phenomena. First, progressive wave model is chosen. Then, the Transverse Transmission Loss (TTL) is predicted at different frequencies of interest. This formulation is extended to the standing wave model by which results for anechoic, rigid end and open end boundary conditions are obtained. Transverse transmission loss (TTL) predicted, based on the analytical model, is compared and validated with computational results using a commercial 3-D numerical simulation (vibro-acoustic) software package like SYSNOISE. Same model is used for non-circular shell with flat-oval configuration. And also breakout noise obtained from different configurations like circular, elliptical, flat-oval, rectangular and square, all having the same equivalent radius, are compared. Finally, by incorporating effects of finite length of the muffler and end plates, analytical model has been developed for a circular shell. Parametric studies have been done wherever required to evolve the design guidelines which will be helpful for designers.

The Shock and Vibration Digest

The Shock and Vibration Digest
A Publication of the Shock and Vibration Information Center, Naval Research Laboratory

by Anonim

  • Publisher : Unknown Publisher
  • Release : 2002
  • Pages : 329
  • ISBN : 9876543210XXX
  • Language : En, Es, Fr & De
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Rocket Propulsion

Rocket Propulsion
A Book

by Stephen D. Heister,William E. Anderson,Timothée L. Pourpoint,R. Joseph Cassady

  • Publisher : Cambridge University Press
  • Release : 2019-02-07
  • Pages : 510
  • ISBN : 1108422276
  • Language : En, Es, Fr & De
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Equips students with an up-to-date practical knowledge of rocket propulsion, numerous homework problems, and online self-study materials.

A Galerkin Method for Linear Pde Systems in Circular Geometries with Structural Acoustic Applications

A Galerkin Method for Linear Pde Systems in Circular Geometries with Structural Acoustic Applications
A Book

by National Aeronautics and Space Administration (NASA)

  • Publisher : Createspace Independent Publishing Platform
  • Release : 2018-06-28
  • Pages : 38
  • ISBN : 9781722001193
  • Language : En, Es, Fr & De
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A Galerkin method for systems of PDE's in circular geometries is presented with motivating problems being drawn from structural, acoustic, and structural acoustic applications. Depending upon the application under consideration, piecewise splines or Legendre polynomials are used when approximating the system dynamics with modifications included to incorporate the analytic solution decay near the coordinate singularity. This provides an efficient method which retains its accuracy throughout the circular domain without degradation at singularity. Because the problems under consideration are linear or weakly nonlinear with constant or piecewise constant coefficients, transform methods for the problems are not investigated. While the specific method is developed for the two dimensional wave equations on a circular domain and the equation of transverse motion for a thin circular plate, examples demonstrating the extension of the techniques to a fully coupled structural acoustic system are used to illustrate the flexibility of the method when approximating the dynamics of more complex systems. Smith, Ralph C. Unspecified Center NAS1-19480; NAG1-1600; RTOP 505-90-52-01...

Advanced Applications in Acoustics, Noise and Vibration

Advanced Applications in Acoustics, Noise and Vibration
A Book

by Frank Fahy,John Walker

  • Publisher : CRC Press
  • Release : 2018-09-03
  • Pages : 656
  • ISBN : 1482289083
  • Language : En, Es, Fr & De
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Advanced Applications in Acoustics, Noise and Vibration provides comprehensive and up-to-date overviews of knowledge, applications and research activities in a range of topics that are of current interest in the practice of engineering acoustics and vibration technology. The thirteen chapters are grouped into four parts: signal processing, acoustic modelling, environmental and industrial acoustics, and vibration. Following on from its companion volume Fundamentals of Noise and Vibration this book is based partly on material covered in a selection of elective modules in the second semester of the Masters programme in 'Sound and Vibration Studies' of the Institute of Sound and Vibration Research at the University of Southampton, UK and partly on material presented in the annual ISVR short course 'Advanced Course in Acoustics, Noise and Vibration'.

Issues in Acoustic and Ultrasound Technology: 2013 Edition

Issues in Acoustic and Ultrasound Technology: 2013 Edition
A Book

by Anonim

  • Publisher : ScholarlyEditions
  • Release : 2013-05-01
  • Pages : 991
  • ISBN : 1490105743
  • Language : En, Es, Fr & De
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Issues in Acoustic and Ultrasound Technology: 2013 Edition is a ScholarlyEditions™ book that delivers timely, authoritative, and comprehensive information about Applied Acoustics. The editors have built Issues in Acoustic and Ultrasound Technology: 2013 Edition on the vast information databases of ScholarlyNews.™ You can expect the information about Applied Acoustics in this book to be deeper than what you can access anywhere else, as well as consistently reliable, authoritative, informed, and relevant. The content of Issues in Acoustic and Ultrasound Technology: 2013 Edition has been produced by the world’s leading scientists, engineers, analysts, research institutions, and companies. All of the content is from peer-reviewed sources, and all of it is written, assembled, and edited by the editors at ScholarlyEditions™ and available exclusively from us. You now have a source you can cite with authority, confidence, and credibility. More information is available at http://www.ScholarlyEditions.com/.

Piezoelectric and Acoustic Materials for Transducer Applications

Piezoelectric and Acoustic Materials for Transducer Applications
A Book

by Ahmad Safari,E. Koray Akdogan

  • Publisher : Springer Science & Business Media
  • Release : 2008-09-11
  • Pages : 482
  • ISBN : 0387765409
  • Language : En, Es, Fr & De
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The book discusses the underlying physical principles of piezoelectric materials, important properties of ferroelectric/piezoelectric materials used in today’s transducer technology, and the principles used in transducer design. It provides examples of a wide range of applications of such materials along with the appertaining rationales. With contributions from distinguished researchers, this is a comprehensive reference on all the pertinent aspects of piezoelectric materials.

Finite Element and Boundary Methods in Structural Acoustics and Vibration

Finite Element and Boundary Methods in Structural Acoustics and Vibration
A Book

by Noureddine Atalla,Franck Sgard

  • Publisher : CRC Press
  • Release : 2015-04-17
  • Pages : 470
  • ISBN : 1466592885
  • Language : En, Es, Fr & De
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Effectively Construct Integral Formulations Suitable for Numerical ImplementationFinite Element and Boundary Methods in Structural Acoustics and Vibration provides a unique and in-depth presentation of the finite element method (FEM) and the boundary element method (BEM) in structural acoustics and vibrations. It illustrates the principles using a

Aeroacoustics of Flight Vehicles

Aeroacoustics of Flight Vehicles
Theory and Practice

by Harvey H. Hubbard

  • Publisher : Unknown Publisher
  • Release : 1991
  • Pages : 329
  • ISBN : 9876543210XXX
  • Language : En, Es, Fr & De
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A Galerkin Method for Linear PDE Systems in Circular Geometries with Structural Acoustic Applications

A Galerkin Method for Linear PDE Systems in Circular Geometries with Structural Acoustic Applications
A Book

by R. C. Smith,Institute for Computer Applications in Science and Engineering

  • Publisher : Unknown Publisher
  • Release : 1994
  • Pages : 35
  • ISBN : 9876543210XXX
  • Language : En, Es, Fr & De
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A Galerkin method for systems of PDE's in circular geometries is presented with motivating problems being drawn from structural, acoustic and structural acoustic applications. Depending upon the application under consideration, piecewise splines or Legendre polynomials are used when approximating the system dynamics with modifications included to incorporate the analytic solution decay near the coordinate singularity. This provides an efficient method which retains its accuracy throughout the circular domain without degradation at the singularity. Because the problems under consideration are linear or weakly nonlinear with constant or piecewise constant coefficients, transform methods for the problems are not investigated. While the specific method is developed for the 2-D wave equation on a circular domain and the equation of transverse motion for a thin circular plate, examples demonstrating the extension of the techniques to a fully coupled structural acoustic system are used to illustrate the flexibility of the method when approximating the dynamics of more complex systems.

Formulas of Acoustics

Formulas of Acoustics
A Book

by F.P. Mechel

  • Publisher : Springer Science & Business Media
  • Release : 2013-06-29
  • Pages : 1167
  • ISBN : 3662072963
  • Language : En, Es, Fr & De
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This application-orientated collection of formulas has been written by applied scientists and industrial engineers for design professionals and students who work in engineering acoustics. It is subdivided into the most important fields of applied acoustics, each dealing with a well-defined type of problem. It provides easy and rapid access to profound and comprehensive information. In order to keep the text as concise as possible, the derivation of a formula is described as briefly as possible and the reader is referred to the original source. Besides the formulas, useful principles and computational procedures are given.

Underwater Acoustic Modeling and Simulation

Underwater Acoustic Modeling and Simulation
A Book

by Paul C. Etter

  • Publisher : CRC Press
  • Release : 2018-04-06
  • Pages : 638
  • ISBN : 1351679724
  • Language : En, Es, Fr & De
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This newest edition adds new material to all chapters, especially in mathematical propagation models and special applications and inverse techniques. It has updated environmental-acoustic data in companion tables and core summary tables with the latest underwater acoustic propagation, noise, reverberation, and sonar performance models. Additionally

Underwater Acoustic Modeling and Simulation, Fourth Edition

Underwater Acoustic Modeling and Simulation, Fourth Edition
A Book

by Paul C. Etter

  • Publisher : CRC Press
  • Release : 2013-02-21
  • Pages : 554
  • ISBN : 1466564938
  • Language : En, Es, Fr & De
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Underwater Acoustic Modeling and Simulation, Fourth Edition continues to provide the most authoritative overview of currently available propagation, noise, reverberation, and sonar-performance models. This fourth edition of a bestseller discusses the fundamental processes involved in simulating the performance of underwater acoustic systems and emphasizes the importance of applying the proper modeling resources to simulate the behavior of sound in virtual ocean environments. New to the Fourth Edition Extensive new material that addresses recent advances in inverse techniques and marine-mammal protection Problem sets in each chapter Updated and expanded inventories of available models Designed for readers with an understanding of underwater acoustics but who are unfamiliar with the various aspects of modeling, the book includes sufficient mathematical derivations to demonstrate model formulations and provides guidelines for selecting and using the models. Examples of each type of model illustrate model formulations, model assumptions, and algorithm efficiency. Simulation case studies are also included to demonstrate practical applications. Providing a thorough source of information on modeling resources, this book examines the translation of our physical understanding of sound in the sea into mathematical models that simulate acoustic propagation, noise, and reverberation in the ocean. The text shows how these models are used to predict and diagnose the performance of complex sonar systems operating in the undersea environment.

Acoustic Interactions with Submerged Elastic Structures

Acoustic Interactions with Submerged Elastic Structures
Part III: Acoustic Propagation and Scattering, Wavelets and Time Frequency Analysis

by Ardéshir Guran,Adrianus De Hoop,Dieter Guicking,Francesco Mainardi

  • Publisher : World Scientific
  • Release : 2001-07-31
  • Pages : 444
  • ISBN : 9814497819
  • Language : En, Es, Fr & De
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The interaction of acoustic fields with submerged elastic structures, both by propagation and scattering, is being investigated at various institutions and laboratories world-wide with ever-increasing sophistication of experiments and analysis. This book offers a collection of contributions from these research centers that represent the present state-of-the-art in the study of acoustic elastic interaction, being on the cutting edge of these investigations. This includes the description of acoustic scattering from submerged elastic objects and shells by the Resonance Scattering Theory of Flax, Dragonette and Überall, and the interaction of these phenomena in terms of interface waves. It also includes the use of this theory for the purpose of inverse scattering, i.e. the determination of the scattered objects properties from the received acoustic backscattered signals. The problem of acoustically excited waves in inhomogeneous and anisotropic materials, and of inhomogeneous propagating waves is considered. Vibrations and resonances of elastic shells, including shells with various kinds of internal attachments, are analyzed. Acoustic scattering experiments are described in the time domain, and on the basis of the Wigner–Ville distribution. Acoustic propagation in the water column over elastic boundaries is studied experimentally both in laboratory tanks, and in the field, and is analyzed theoretically. Ultrasonic nondestructive testing, including such aspects like probe modelling, scattering by various types of cracks, receiving probes and calibration by a side-drilled hole is also studied in details. A comprehensive picture of these complex phenomena and other aspects is presented in the book by researchers that are experts in each of these domains, giving up-to-date accounts of the field in all these aspects. Contents:Three Dimensional Underwater Sound Propagation Over Sloping Bottoms (S A L Glegg & J M Riley)Modeling of Sound Propagation Over a Shear-Supporting Sediment Layer and Substrate (J I Arvelo et al.)Propagation of Acoustic Pulses in Layered Media (P P Delsanto et al.)Response of a Vibrating Structure to a Turbulent Flow Wall Pressure: Fluid-Loaded Structure Modes Series and Boundary Element Method (P J T Filippi & D Mazzoni)Plane Evanescent Waves and Interface Waves (F Luppé et al.)Application of Wavelet Analysis to Inverse Scattering (W Tobocman)Application of Time-Frequency Analysis to the Characterization of Acoustical Scattering (M E Zakharia et al.)Acoustical Resonance Scattering Theory for Strongly Overlapping Resonances (H Peine & D Guicking)Inverse Scattering Based on the Resonances of the Target (P P Delsanto et al.)Modern Developments in the Theory and Application of Classical Scattering (M F Werby & N A Sidorovskaia)Modeling and Ultrasonic Measurements of Damage (A Gérard)Some Aspects of Nonlinear Wave Propagation (A Jeffrey) Readership: Nonlinear scientists. keywords: “… Überall's work in acoustic and electromagnetic scattering has evoked much interest, in the US as well as abroad, because of its possible practical applications, as well as the theoretical understanding. Many collaborators have been inspired by it, and have now contributed to this volume. The book is an excellent contribution to the literature of Acoustics and Wave Propagation. Professor Guran is to be congratulated for organizing and editing this volume.” Prof. Hans A Bethe Nobel Laureate Cornell University “This highly interesting collection of papers makes a valuable addition to the acoustics literature.” Applied Acoustics “… This is an impressive collection of 45 research and review chapters involving 78 authors. Taking into account the high educational quality and research value of this set of books, it is recommended for purchase by libraries that serves research programs involved with acoustic scattering related to underwater and ultrasonics.” Professor Philip Marston Journal of the Acoustical Society of America

Underwater Acoustic Modelling and Simulation

Underwater Acoustic Modelling and Simulation
A Book

by P.C. Etter

  • Publisher : CRC Press
  • Release : 2003-12-08
  • Pages : 384
  • ISBN : 1482295148
  • Language : En, Es, Fr & De
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Underwater Acoustic Modeling and Simulation examines the translation of our physical understanding of sound in the sea into mathematical models that can simulate acoustic propagation, noise and reverberation in the ocean. These models are used in a variety of research and operational applications to predict and diagnose the performance of complex s

Modelling, Simulation and Data Analysis in Acoustical Problems

Modelling, Simulation and Data Analysis in Acoustical Problems
A Book

by Claudio Guarnaccia,Lamberto Tronchin,Massimo Viscardi

  • Publisher : MDPI
  • Release : 2020-06-23
  • Pages : 584
  • ISBN : 3039282840
  • Language : En, Es, Fr & De
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Modelling and simulation in acoustics is currently gaining importance. In fact, with the development and improvement of innovative computational techniques and with the growing need for predictive models, an impressive boost has been observed in several research and application areas, such as noise control, indoor acoustics, and industrial applications. This led us to the proposal of a special issue about “Modelling, Simulation and Data Analysis in Acoustical Problems”, as we believe in the importance of these topics in modern acoustics’ studies. In total, 81 papers were submitted and 33 of them were published, with an acceptance rate of 37.5%. According to the number of papers submitted, it can be affirmed that this is a trending topic in the scientific and academic community and this special issue will try to provide a future reference for the research that will be developed in coming years.

Finite Element Analysis of Acoustic Scattering

Finite Element Analysis of Acoustic Scattering
A Book

by Frank Ihlenburg

  • Publisher : Springer Science & Business Media
  • Release : 2006-05-02
  • Pages : 226
  • ISBN : 0387227008
  • Language : En, Es, Fr & De
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A cognitive journey towards the reliable simulation of scattering problems using finite element methods, with the pre-asymptotic analysis of Galerkin FEM for the Helmholtz equation with moderate and large wave number forming the core of this book. Starting from the basic physical assumptions, the author methodically develops both the strong and weak forms of the governing equations, while the main chapter on finite element analysis is preceded by a systematic treatment of Galerkin methods for indefinite sesquilinear forms. In the final chapter, three dimensional computational simulations are presented and compared with experimental data. The author also includes broad reference material on numerical methods for the Helmholtz equation in unbounded domains, including Dirichlet-to-Neumann methods, absorbing boundary conditions, infinite elements and the perfectly matched layer. A self-contained and easily readable work.