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Acoustic Finite Element Modeling Of An Immersed Structure
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Book Synopsis Acoustic Finite Element Modeling of an Immersed Structure by : Mija Helena Hubler
Download or read book Acoustic Finite Element Modeling of an Immersed Structure written by Mija Helena Hubler and published by . This book was released on 2009 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work investigates an acoustic fluid structure interaction formulation. It is applied to an immersed steel structure in non-flowing water. The system is discretized using 3D solid continuum and acoustic fluid finite elements. Fluid structure interactions are formulated according to Zienkiewicz's work for submerged dams. We find that the sensitivity of various approximations and problem parameters are critical to fluid structure finite element problems of this formulation. In conclusion, this formulation is found to be useful as a motion study for sample problems of all scales for which the acoustic motion is to be approximated.
Book Synopsis Finite Element and Boundary Methods in Structural Acoustics and Vibration by : Noureddine Atalla
Download or read book Finite Element and Boundary Methods in Structural Acoustics and Vibration written by Noureddine Atalla and published by CRC Press. This book was released on 2015-04-17 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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
Book Synopsis Finite Element Approach to Acoustic Radiation from Elastic Structures by : JOHN T. HUNT
Download or read book Finite Element Approach to Acoustic Radiation from Elastic Structures written by JOHN T. HUNT and published by . This book was released on 1974 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: AN APPROXIMATION METHOD IS PRESENTED FOR SOLVING THE EQUATIONS OF MOTION THAT DESCRIBE THE VIBRATION OF AN ELASTIC STRUCTURE IMMERSED IN AN INFINITE ACOUSTIC FLUID MEDIUM. THE MATHEMATICAL MODEL THAT IS DEVELOPED USES THE FINITE ELEMENT METHOD TO CALCULATE THE VIBRATIONAL CHARACTERISTICS OF THE ELASTIC BODY AND THE ACOUSTIC PRESSURE FIELD OF THAT PORTION OF THE FLUID WHICH CLOSELY SURROUNDS THE VIBRATING BODY. ANALYTICAL METHODS ARE USED TO OBTAIN THE BOUNDARY CONDITIONS FOR THIS MATHEMATICAL MODEL. THIS TECHNIQUE CAN BE USED TO PREDICT THE RESPONSE OF AN ELASTIC STRUCTURE OVER A WIDE RANGE OF FREQUENCIES AND THE ACOUSTIC PRESSURE AT A LARGE NUMBER OF FIELD POINTS IN BOTH THE NEARFIELD AND FARFIELDS. IT AVOIDS THE DIFFICULTIES ENCOUNTERED AT EIGENVALUES OF THE INTERIOR PROBLEM BY DETERMINING EXACTLY THE ONE DEGREE OF FREEDOM NEEDED TO OVERDETERMINE THE SURFACE EQUATIONS. EXPERIMENTAL VALIDATION OF THEORETICAL PREDICTIONS IS GIVEN FOR A PIEZOELECTRIC CYLINDER, AND A COMPUTER-GENERATED CONTOUR PLOT OF A PREDICTED NEARFIELD PRESSURE DISTRIBUTION IS SHOWN.
Book Synopsis Acoustic Interactions with Submerged Elastic Structures by : A. Guran
Download or read book Acoustic Interactions with Submerged Elastic Structures written by A. Guran and published by World Scientific. This book was released on 2001 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 berall, 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 WignerOCoVille 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: Discrete Spectral Analysis for Solitary Waves (J Engelbrecht et al.); Propagation and Interaction of Waves in Nonlinear-Elastic Solids with Microstructures (V I Erofeyev); Matched Field Processing: A Powerful Tool for the Study of Oceans and Scatterers (A Tolstoy); Progress in Underwater Acoustic Modeling (P C Etter); Reflectivity Response of a Submerged Layer with Density, Sound Velocity and Absorbtion Gradients (R Carb-Fit(r)); Mathematical Aspects of Wave Phenomena in a Wave Guide with Elastic Walls and Operator Polynomials (B P Belinskiy & J P Dauer); On Some General Mathematical Properties of the System Elastic Plate OCo Acoustic Medium (B P Belinskiy); Acoustic Scattering from Finite Length Cylinders Encapped by Two Hemispheres (D Decultot et al.); Acoustic Scattering from a Circular Cylindrical Shell Immersed in Water. Generation and Reradiation of Guided Waves (F L(r)on & G Maze); The Finite Element/Boundary Element Approach to the Radiation and Scattering of Submerged Shells Including Internal Structure or Equipment (R Miller); Resonance Extraction, Phase Matching Method and the Surface Paths for Finite Elastic Cylinders (X-L Bao); Nonlinear Waves in Thermoelastic Solids Undergoing Phase Transitions (J K Knowles). Readership: Nonlinear scientists."
Book Synopsis A Symmetric Finite Element Formulation for Acoustic Fluid-structure Interaction Analysis by :
Download or read book A Symmetric Finite Element Formulation for Acoustic Fluid-structure Interaction Analysis written by and published by . This book was released on 1987 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Scaled Boundary Finite Element Method by : Chongmin Song
Download or read book The Scaled Boundary Finite Element Method written by Chongmin Song and published by John Wiley & Sons. This book was released on 2018-06-19 with total page 775 pages. Available in PDF, EPUB and Kindle. Book excerpt: An informative look at the theory, computer implementation, and application of the scaled boundary finite element method This reliable resource, complete with MATLAB, is an easy-to-understand introduction to the fundamental principles of the scaled boundary finite element method. It establishes the theory of the scaled boundary finite element method systematically as a general numerical procedure, providing the reader with a sound knowledge to expand the applications of this method to a broader scope. The book also presents the applications of the scaled boundary finite element to illustrate its salient features and potentials. The Scaled Boundary Finite Element Method: Introduction to Theory and Implementation covers the static and dynamic stress analysis of solids in two and three dimensions. The relevant concepts, theory and modelling issues of the scaled boundary finite element method are discussed and the unique features of the method are highlighted. The applications in computational fracture mechanics are detailed with numerical examples. A unified mesh generation procedure based on quadtree/octree algorithm is described. It also presents examples of fully automatic stress analysis of geometric models in NURBS, STL and digital images. Written in lucid and easy to understand language by the co-inventor of the scaled boundary element method Provides MATLAB as an integral part of the book with the code cross-referenced in the text and the use of the code illustrated by examples Presents new developments in the scaled boundary finite element method with illustrative examples so that readers can appreciate the significant features and potentials of this novel method—especially in emerging technologies such as 3D printing, virtual reality, and digital image-based analysis The Scaled Boundary Finite Element Method: Introduction to Theory and Implementation is an ideal book for researchers, software developers, numerical analysts, and postgraduate students in many fields of engineering and science.
Book Synopsis Finite Element Programs for Structural Vibrations by : C.T.F. Ross
Download or read book Finite Element Programs for Structural Vibrations written by C.T.F. Ross and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: Finite Element Programs for Structural Vibrations presents detailed descriptions of how to use six computer programs (written in Fortran 77) to determine the resonant frequencies of one, two, and three-dimensional skeletal structures through the finite element method. Chapter 1 is on "The Finite Element Method" and Chapter 2 demonstrates, with the aid of hand calculations, the finite element solution of some smaller structures. Chapter 3 covers "The Modular Approach", and Chapters 4 to 9 describe the six computer programs, with a large number of worked examples. The six computer programs are given in Appendices I through VI, and on a 3 1/2'' disk included with the book. The programs are suitable for use on IBM (or compatible) PC (640K or more) or minicomputer.
Book Synopsis Acoustic Interactions with Submerged Elastic Structures by : Ardshir Guran
Download or read book Acoustic Interactions with Submerged Elastic Structures written by Ardshir Guran and published by World Scientific. This book was released on 2002 with total page 522 pages. Available in PDF, EPUB and Kindle. Book excerpt: This series of volumes constitutes an outstanding collection of contributions by the most active research workers in the area of acoustics and mechanics. It brings the reader up to date on the status of the various aspects of research in this field. The volumes should preserve their value for a long time, as they represent a monument to the achievements of human research capabilities in the underwater-acoustics aspects of the environment.
Book Synopsis Finite Element Modeling and Simulation of Submerged Flexible Structures by : Ahsan Faiz
Download or read book Finite Element Modeling and Simulation of Submerged Flexible Structures written by Ahsan Faiz and published by . This book was released on 1998 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Discrete-Element Acoustic Analysis of Submerged Structures Using Doubly Asymptotic Approximations by : J. A DeRuntz (Jr)
Download or read book Discrete-Element Acoustic Analysis of Submerged Structures Using Doubly Asymptotic Approximations written by J. A DeRuntz (Jr) and published by . This book was released on 1985 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt: Doubly Asymptotic Approximations have been found to offer significant advantages for the treatment of steady-state fluid-structure interaction in vibration, acoustic-radiation, and acoustic-scattering problems for complex submerged structures. This paper describes the theoretical foundations, development, and verification of two boundary-element/finite-element processors that implement this approach. The first processor is SWEEPS, which determines the structural response of and surface pressure on a vibrating submerged body. The second is TARGET, which embodies a discretized form of the Helmholtz integral equation to obtain fluid pressures away from the body. To test these processors, two problems involving a spherical shell in an infinite fluid have been solved. The first problem is one of modal internal forcing; while the second is concerned with forcing by incident plane waves. The computational results exhibit excellent agreement with closed form plane waves. The computational results exhibit excellent agreement with closed form solutions. Additional keywords: USA (Underwater Shock Analysis); USA computer program; underwater acoustics; computer program verification; charts. (Author).
Book Synopsis Finite Element Analysis of Structure-acoustic Interaction by : Håkan Carlsson
Download or read book Finite Element Analysis of Structure-acoustic Interaction written by Håkan Carlsson and published by . This book was released on 1988 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Finite Element Analysis of Interacting Structure-acoustic Systems by : Håkan Carlsson
Download or read book Finite Element Analysis of Interacting Structure-acoustic Systems written by Håkan Carlsson and published by . This book was released on 1990 with total page 143 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Finite Element Analysis of Acoustic Scattering by : Frank Ihlenburg
Download or read book Finite Element Analysis of Acoustic Scattering written by Frank Ihlenburg and published by Springer Science & Business Media. This book was released on 2006-03-29 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Finite Element Analysis of Structure-acoustic Systems by : Peter Davidsson
Download or read book Finite Element Analysis of Structure-acoustic Systems written by Peter Davidsson and published by . This book was released on 2001 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Computational Acoustics of Noise Propagation in Fluids - Finite and Boundary Element Methods by : Steffen Marburg
Download or read book Computational Acoustics of Noise Propagation in Fluids - Finite and Boundary Element Methods written by Steffen Marburg and published by Springer Science & Business Media. This book was released on 2008-02-27 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Finite Element Analysis of Structure-acoustic Systems by : Håkan Carlsson
Download or read book Finite Element Analysis of Structure-acoustic Systems written by Håkan Carlsson and published by . This book was released on 1992 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Finite element analysis of wave propagation and scattering with applications to acoustic fluid-structure interaction by : Frank Ihlenburg
Download or read book Finite element analysis of wave propagation and scattering with applications to acoustic fluid-structure interaction written by Frank Ihlenburg and published by . This book was released on 1997 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:
