finite element analysis of acoustic scattering applied mathematical sciences

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Finite Element Analysis Of Acoustic Scattering

Author : Frank Ihlenburg
ISBN : 9780387227009
Genre : Mathematics
File Size : 73. 13 MB
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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.

Sound Engineering Im Automobilbereich

Author : Klaus Genuit
ISBN : 3642014151
Genre : Technology & Engineering
File Size : 67. 77 MB
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Mit steigenden Kundenansprüchen gewinnen die Fragen unerwünschter Geräusche im Kraftfahrzeug zunehmend an Bedeutung. Sie begleiten Ingenieure im Automobilbereich von der Konzept- bis zur Serienphase. Dabei ist das Thema stets im Kontext weiterer Entwicklungsfelder wie Antrieb oder Aerodynamik zu betrachten. Das Überblickswerk bietet die Möglichkeit, sich schnell in das Thema einzuarbeiten und schnell auf Grundlagen und Details zugreifen zu können. Dabei werden die Themen Fahrzeuginnengeräusche und Fahrzeugaußengeräusche gleichermaßen behandelt.

Praktische Maschinenakustik

Author : Franz G. Kollmann
ISBN : 9783540309758
Genre : Technology & Engineering
File Size : 79. 26 MB
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Praktische Probleme der Maschinenakustik sind komplex. Aus diesem Grund wird im vorliegenden Buch vorrangig die indirekte Kette der Schallabstrahlung behandelt. Es werden Berechnungsgleichungen, akustische Messverfahren und konstruktive Maßnahmen zur Reduzierung der indirekten Abstrahlung von Geräuschen vorgestellt. Ausgehend von den im Inneren einer Maschine wirkenden dynamischen Kräften werden die Anregung von Körperschall und dessen Abstrahlung von der Oberfläche der Maschine behandelt.

Numerical Simulations In Room Acoustics Using Direct Coupling Techniques And Finite Elements

Author : Martina Pospiech
ISBN : 9783832531393
Genre :
File Size : 65. 11 MB
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This thesis presents a coupling approach for time-harmonic problems in linear room acoustics. Therein the closed acoustic system is subdivided into air, sound source and different boundary components. The sound field of each air component is approximated with the help of modal basis functions and continuous transitions between single components are enabled by enforcing coupling conditions. Coupling to realistic boundary conditions is realized by wavenumber- and frequency-dependent impedance functions for plate-like sound absorbers. Afterwards the solution is computed by minimizing the energy based on Hamilton's Principle. For computing the basis functions and the energies of the components the Spectral Finite Element Method and the adapted Patch Recovery Method are applied. Finally numerical benchmark-simulations show the applications of this coupling approach.

Biomedical Applications Of Vibration And Acoustics For Imaging And Characterisations

Author : Mostafa Fatemi
ISBN : STANFORD:36105130544310
Genre : Medical
File Size : 54. 79 MB
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The primary objective of this book is to compile the research topics on biomedical imaging and tissue characterisation techniques that utilise vibration and acoustics.

Finite Element Methods For Maxwell S Equations

Author : Peter Monk
ISBN : 0198508883
Genre : Mathematics
File Size : 57. 85 MB
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The emphasis in on finite element methods for scattering problems that involve the solution of Maxwell's equations on infinite domains. Suitable variational formulations are developed and justified mathematically. An error analysis of edge finite element methods that are particularly well suited to Maxwell's equations is the main focus of the book.

The Journal Of The Acoustical Society Of America

Author : Acoustical Society of America
ISBN : STANFORD:36105122645760
Genre : Acoustical engineering
File Size : 69. 34 MB
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Philosophical Transactions

Author :
ISBN : UCSD:31822033900614
Genre : Physical sciences
File Size : 66. 4 MB
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Boundary Element Analysis

Author : Martin Schanz
ISBN : 9783540475330
Genre : Technology & Engineering
File Size : 43. 92 MB
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This volume contains eleven contributions on boundary integral equation and boundary element methods. Beside some historical and more analytical aspects in the formulation and analysis of boundary integral equations, modern fast boundary element methods are also described and analyzed from a mathematical point of view. In addition, the book presents engineering and industrial applications that show the ability of boundary element methods to solve challenging problems from different fields.

Third International Conference On Mathematical And Numerical Aspects Of Wave Propagation

Author : Gary C. Cohen
ISBN : 0898713501
Genre : Science
File Size : 46. 77 MB
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This volume contains the papers presented at the title conference. Speakers from 13 different countries were represented at the meeting. A broad range of topics in theoretical and applied wave propagation is covered.

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