Theoretical and Computational Acoustics '99 : Proceedings of the 4th ICTCA Conference. için kapak resmi
Theoretical and Computational Acoustics '99 : Proceedings of the 4th ICTCA Conference.
Başlık:
Theoretical and Computational Acoustics '99 : Proceedings of the 4th ICTCA Conference.
Yazar:
Seriani, Géza.
ISBN:
9789812703071
Yazar Ek Girişi:
Fiziksel Tanımlama:
1 online resource (160 pages)
İçerik:
CONTENTS -- Preface -- Wave Propagation Theory -- Uniformly Asymptotic Solutions for Pseudodifferential Equations with Singular Integral Operators -- The Kirchhoff-Helmholtz Integral Pair -- Analysis and Processing of Received Signals in Boreholes -- Informational Capacity of Acoustic Measurements -- Resonances of Acoustic Waves Interacting with an Elastic Seabed -- Modeled Velocity and Reflectivity Properties of Anisotropic Hydrated Sediments -- Reflection/Transmission Coefficients at a Plane Interface in Dissipative and Nondissipative Isotropic Media: A Comparison -- Analysis of the Reflection and Transmission Coefficients in Three-Phase Sandstone Reservoirs -- Fractional Diffusive Waves -- Acoustic Excitation of Scholte-Stoneley and Lamb Waves on a Reinforced Cylindrical Shell -- On the Adiabaticity of Acoustic Propagation Through Nongradual Ocean Structures -- Ferromagnets and Kelvin's Medium: Basic Equations and Wave Processes -- Propagation of Ultrasonic Waves in Nonlinear Multilayered Media -- Optimal Model for the Diffraction Effect in the Ultrasonic Field of Piston Transducers -- Oblique Acoustic Axes in Trigonal Crystals -- Acoustic Time Series Variability and Time Reversal Mirror Defocusing Due To Cumulative Effects Of Water Column Variability -- Numerical and Experimental Time-Reversal of Acoustic Waves in Random Media -- Fluctuations of Elastic Waves Due to Random Scattering from Inclusions -- Numerical Study of the Wave Instability Problem with the Effect of the Transverse Velocity Component -- Sound Propagation Vibrations and Noise -- Airborne Acoustics of Explosive Volcanic Eruptions -- Sound Generation of Interacting Perturbed Vortex Rings.

A Wide-Angle Parabolic Equation for Acoustic Waves in Inhomogeneous Moving Media: Applications to Atmospheric Sound Propagation -- Acoustics of Kinematically Complex Shear Flows -- Ultrasound Propagation Through a Rotational Flow: Numerical Methods Compared to Experiments -- Wave Propagation on an Elastic Beam Traveling in a Tube: Linear Theory of Aerodynamic Loading -- On the Vibration of Membrane Partially Protruding Above the Surface of Liquid -- Vibrational Analysis of Ships with Coupled Finite and Boundary Elements -- Transverse Resonant Oscillations in Acoustic Ducts -- Noise Shielding by Simple Barriers: Comparison Between the Performance of Spherical and Line Sound Sources -- Wave Propagation Through Hollow Bodies and Noise Reduction -- Generation of Ground Elastic Waves by Road Vehicles -- Underwater Acoustics -- Broadband Matched-Field Localization Performance in Uncertain Environments Using a Short Array -- A Frequency Domain Inversion Method Applied to Oblique Reflected Signals from a Water-Sediment Interface -- Application of a Three-Dimensional Two-Way Parabolic Equation Model for Reconstructing Images of Underwater Targets -- Determination of a Buried Object in a Two-Layered Shallow Ocean -- New Schemes of Ocean Acoustic Tomography -- Numerical Simulation of Transverse Current Monitoring in the Pram Strait -- Prospects for Medium-Scale Diffraction Tomography on the Shelf -- Engineering Seismology -- Applications of the Modal Summation Technique to the Theoretical Site Response Estimation -- Earthquake Ground Motion Simulation Through the 2-D Spectral Element Method -- The Variational Indirect Boundary Element Method: A Strategy Toward the Solution of Very Large Problems of Site Response.

Efficiency and Optimization of the 3-D Finite-Difference Modeling of Seismic Ground Motion -- Three-Dimensional Ground Motion Simulations for Large Earthquakes on the San Andreas Fault with Dynamic and Observational Constraints -- Modifications of the Ground Motion in Dense Urban Areas -- Numerical Simulations of Strong Ground Motion During Destructive Earthquakes in Hokkaido Japan -- Application of the Integral Laguerre Transforms for Forward Seismic Modeling -- Parallel 3D Fourier Spectral Simulation of Strong Ground Motion in Osaka Basin During the 1995 Kobe Earthquake -- Ultrasonic Field Synthesis and Modelling -- Speed-Accuracy Trade-Offs in Computing Spatial Impulse Responses for Simulating Medical Ultrasound Imaging -- Mechanism of Acoustic Wave Propagation: A Real Role of Virtual Sources -- Synthesis of Unequally Spaced Arrays with Asymmetric Beam Patterns -- Real-Time Deconvolution in Ultrasonic Imaging Systems -- Time Reversal in Acoustics -- Computation of the Ultrasonic Field Radiated by Segmented-Annular Arrays -- Numerical Techniques for Modeling Doppler Ultrasound Spectra Systems -- Influence of the Inter-Element Coupling on Ultrasound Array Radiation Patterns -- Computational Methods -- A Direct Discrete Formulation for the Wave Equation -- An Hexahedral Face Element Method for the Displacement Formulation of Structural Acoustics Problems -- A Comparison of Numerical Methods for Active Sonar Array Performance -- On the Efficient Implementation of the Integral Equation Method in Elastodynamics -- A Generalized Mode Matching Method for Scattering Problems with Unbounded Obstacles -- AILU for Helmholtz Problems: A New Preconditioner Based on the Analytic Parabolic Factorization.

Application of a Domain Decomposition Method with Lagrange Multipliers to Acoustic Problems Arising from the Automotive Industry -- Visualization of the Energy Flow in and Around a Fluid Loaded Elastic Sphere -- Noise Prediction Based on the Spectral Method for Solving a Dissipative Boundary Value Problem in Acoustics and Its Numerical Realization -- Sine Solution of the Shallow Water Equations -- Finite Elements for Wave Problems -- Numerical Studies of Conjugated Infinite Elements for Acoustical Radiation -- A Reflection Free Boundary Condition for Propagation in Uniform Flow Using Mapped Infinite Wave Envelope Elements -- A Review of Infinite Element Methods for Exterior Helmholtz Problems -- On Fundamental Aspects of Exterior Approximations with Infinite Elements -- Finite Element Solution of Two-Dimensional Acoustic Scattering Problems Using Arbitrarily Shaped Convex Artificial Boundaries -- Third-Order Doubly Asymptotic Approximations for Computational Acoustics -- Analytical and Numerical Studies of a Finite Element PML for the Helmholtz Equation -- Continued-Fraction Absorbing Boundary Conditions for the Wave Equation -- Optimal Local Nonreflecting Boundary Conditions for Time-Dependent Waves -- Mixed Finite Elements with Mass-Lumping for the Transient Wave Equation -- Short Wave Modelling Using Special Finite Elements -- A Numerical Comparison of Finite Element Methods for the Helmholtz Equation -- Efficient Computation of Multi-Frequency Far-Field Solutions of the Helmholtz Equation Using Pade Approximation -- An Iterative Time-Stepping Method for Solving First-Order Time Dependent Problems and Its Application to the Wave Equation -- Wave Propagation Modeling.

Fictitious Domains Mixed Finite Elements and Perfectly Matched Layers for 2-D Elastic Wave Propagation -- Higher-Order Mass-Lumped Finite Elements for the Wave Equation -- Numerical Study of Elastic Wave Scattering by Cracks or Inclusions Using the Boundary Integral Equation Method -- Finite-Difference Modeling in Media with Many Small-Scale Cracks -- Scale and Angle Dependent Reflection Properties of Self-Similar Interfaces -- Elastic Waves Generated by High-Speed Trains -- Adaptive Finite Element Techniques for the Acoustic Wave Equation -- Wave Propagation in 2-D Elastic Media Using a Spectral Element Method with Triangles and Quadrangles -- A Comparative Study of Explicit Differential Operators on Arbitrary Grids -- A High-Order Fast Marching Scheme for the Linearized Eikonal Equation -- Frequency Domain Wave Propagation Modeling in Exploration Seismology -- Three-Dimensional Time Domain Modeling of Ultrasonic Wave Propagation in Concrete in Explicit Consideration of Aggregates and Porosity -- Time Domain Modeling of Axisymmetric Wave Propagation in Isotropic Elastic Media with Cent - Cylindrical Elastodynamic Finite Integration Technique -- On the Propagation of Acoustic Pulses in Porous Rigid Media: A Time-Domain Approach -- Triangle-Quadrangle Grid Method for Poroelastic Elastic and Acoustic Wave Equations -- Absorbing Layer via Wave-Equation Splitting -- Optimised Absorbing Boundary Conditions for Elastic-Wave Propagation -- Conjugated Infinite Elements for Two-Dimensional Time-Harmonic Elastodynamics -- Inverse Problems and Tomography -- Reconstruction of Layered Elastic Bottom Characteristics by the Frequency Dependence of Sound Reflectivity -- Joint 3D Traveltime Inversion of P S and Converted Waves -- Complete Families and Rayleigh Obstacles.

A Simple Regularization Method for Solving Acoustical Inverse Scattering Problems.
Özet:
The ICTCA conference provides an interdisciplinary forum for active researchers in academia and industry who are of varying backgrounds to discuss the state-of-the-art developments and results in theoretical and computational acoustics and related topics. The papers presented at the meeting cover acoustical problems of common interest across disciplines and their accurate mathematical and numerical modelling. The present book collects papers that were presented at the 4th meeting and printed in the Journal of Computational Acoustics . There are about 120 full research articles on various subjects, such as wave propagation theory and numerical modelling, sound propagation, vibrations and noise generation, underwater acoustics, engineering seismology, ultrasonic field synthesis and modelling, as well as computational methods, inverse problems and tomography, shallow water acoustics and environmental/bottom parameter extraction. A CD-Rom is attached that allows readers to browse through articles and print those of interest to them. Contents: Wave Propagation Theory; Sound Propagation, Vibrations and Noise; Underwater Acoustics; Engineering Seismology; Ultrasonic Field Synthesis and Modelling; Computational Methods; Finite Elements for Wave Problems; Wave Propagation Modelling; Inverse Problems and Tomography; Geoacoustic Inversion in Shallow Water. Readership: Researchers and engineers in applied acoustics.
Notlar:
Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, 2017. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries.
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