Riassunto
The Boundary Element Method (BEM) has become established as an effective tool for the solutions of problems in engineering science. The salient features of the BEM have been well documented in the open literature and therefore will not be elaborated here. The BEM research has progressed rapidly, especially in the past decade and continues to evolve worldwide. This Symposium was organized to provide an international forum for presentation of current research in BEM for linear and nonlinear problems in solid and fluid mechanics and related areas. To this end, papers on the following topics were included: rotary- wing aerodynamics, unsteady aerodynamics, design and optimization, elasticity, elasto- dynamics and elastoplasticity, fracture mechanics, acoustics, diffusion and wave motion, thermal analysis, mathematical aspects and boundary/finite element coupled methods. A special session was devoted to parallel/vector supercomputing with emphasis on mas- sive parallelism. This Symposium was sponsored by United Technologies Research Center (UTRC) , NASA Langley Research Center, and the International Association of Boundary Ele- ment Methods (lAB EM) . We thank the UTRC management for their permission to host this Symposium. In particular, we thank Dr. Arthur S. Kesten and Mr. Robert E. Olson for their encouragement and support. We gratefully acknowledge the support of Dr. E. Carson Yates, Jr. of NASA Langley, Prof. Luigi Morino, Dr. Thomas A.
Contenuti
Rotary-Wing Aerodynamics.- Boundary Integral Formulations of the Scalar and Vector Wave Equations with Arbitrary Moving Boundaries.- Time and Frequency Domain Aerodynamics for Flutter of Helicopter Rotors in Hover.- Application of a Panel Method to Aeroelastic Stability of Rotors in Hover.- A General Purpose Fixed-Wing and Rotary-Wing Compressible Aerodynamics Analysis Method.- Turbomachinery Blade Loading Prediction Using the Panel Method.- Panel Methods for Multiple-Rotor Aerodynamics.- BEM for the Analysis of Unsteady Aerodynamics of Windmill Rotors in the Presence of Yaw.- Unsteady Aerodynamics.- A Vortex Method for Predicting Unsteady Flow and Boundary Layer Development Around an Airfoil.- A General Approach to Unsteady Flows in Aerodynamics: Classical Results and Perspectives.- Viscous/Separated Flows.- A Unified Approach for Potential and Viscous Flows in Fixed-Wing and Rotary-Wing Aerodynamics.- Linkage Between Potential and Viscous Flows.- Boundary Element Analysis of Viscous Fluid Flow Problems Using the Time Splitting Method.- Advanced Boundary Element Methods for Incompressible Thermoviscous Flow.- A Coupling of BEM and FEM for the Viscous Flow Problem.- Transient Flow Separation at High-Angle-of-Attack.- A Boundary Element Model for the Taylor-Couette Instability.- Boundary Element Methods for the Navier Stokes Equations.- Transonic/Nonlinear Plows.- Boundary Element-Lagrangian Solution Method for Nonlinear Free Surface Problems.- Unsteady Three-Dimensional Transonic Flow Computations Using Field Element Method.- Generalization of the Boundary Integral Method to Nonlinear Problems of Compressible Fluid Flow: The No-mesh Alternative — Part I.- Generalization of the Boundary Integral Method to Nonlinear Problems of Compressible Fluid Flow: The No-Mesh Alternative — Part II.- Unsteady Field Element Method with Embedded Euler Domain for Transonic Pitching Airfoil Flows.- Elasticity.- Direct vs. Indirect Boundary Element Methods.- Determination of the Maximum Thread Stress in Threaded Structures Using the Boundary Element Method.- Absolute p-Refinement of Two-Dimensional Elasticity Problems in the Vicinity of Boundary Solution Singularities.- A Boundary Element Algorithm for Plate Bending Problems Based on Cauchy’s Integral Formula.- Stepwise Linear Regression Particular Integrals for Uncoupled Thermoelasticity with Boundary Elements.- Boundary Element Method for Composite Bodies.- Integration of 3D Boundary Elements for Static Elasticity.- Alternative Methods for Substructures.- Beasy — An Analysis Tool for Design Engineers.- Elastoplasticity.- Coupling of Finite Element and Boundary Element Super-Element Methods.- A Variational Formulation of the Boundary Integral Equation Method in Elastodynamics.- Progress in Applications of BEM to Inelastic Analysis of Solids.- Bifurcation Analysis of Elastic Shallow Arch by the Boundary-Domain Element Method.- Inelastic Analysis via Integral Equations: The Symmetric Approach Illustrated with Reference to the Beam on Elastic Foundation.- On Boundary Element Inelastic Analysis in the Presence of Softening.- Elastodynamics.- An Algorithm for Vectorized Computation in Boundary Element Methods.- Overcoming Nonuniqueness in the Direct BIEM for Three-Dimensional Steady-State Exterior Elastodynamic Problems.- Efficient Time and Space Integrations of Stokes Fundamental Solutions — Applications to a Direct Time Domain BEM for Elastodynamics.- Analytical Treatment of Free Term for 3-Dimensional Elastodynamic BEM.- Fracture.- Analysis of 3-D Near-interface Fractures in Bounded, Heterogeneous Domains Using the Surface Integral and Finite Element Hybrid Method.- Development of Yield Strip Models Using the Surface Integral and Finite Element Hybrid Method.- Time Domain Boundary Element Analysis of Two-Dimensional Crack Problems.- Fracture Analysis of Asymmetrical Cracks by the Surface Integral and Finite Element Hybrid Method.- Regularised BIEs for Miscellaneous Elasticity Problems.- A B. E. Solution to Some Contact Problems with Adhesion.- Design and Optimization.- Calculation of Aerodynamic Sensitivities by Boundary-Integral Methods and Application to Lifting-Surface Theory.- Aerodynamic Surface Element Modeling for Analysis of Flight Dynamics.- A Boundary Element Shape Design Sensitivity Analysis Formulation for Thermal Radiation Problems.- Design Sensitivity Analysis for Potential Problems by the Derivative Boundary Element Method.- Consistent Sharp Corner Formulations for Boundary Element Analysis and Sensitivity Analysis.- A Direct and Indirect Approach to Shape Optimization Using the Boundary Element Method.- A Variational Approach for the Sensitivity of Stress Constraints Using Boundary Elements.- Mathematical Aspects.- Some Observations on the Boundary Element Method.- Higher Order Elements and Element Enhancement by Combined Regular and Hypersingular Boundary Integral Equations.- Uniform Convergence of Boundary Element Solutions Using the Collocation Methods.- An Algorithm for Computation of Delay Times in Subsonic and Supersonic Rotary Propeller Flow.- An Efficient Nonlinear Transformation for the Numerical Computation of the Singular Integrals Appearing in the 2-D Boundary Element Method.- Parallel Processing.- Block LU Decomposition on the Connection Machine System.- Parallel Implementation on the 1CAP/3090 of a Boundary Element Method Formulation for Fractional Operator Modeled Viscoelastodynamic Structures.- Helicopter Free-Wake Analysis on a Massively Parallel Computer.- The Influence of Massively Parallel Processing in Boundary Element Computations.- Acoustics.- High Speed Propeller Acoustics and Aerodynamics — A Boundary Element Approach.- A Unified Approach for Aerodynamics and Aeroacoustics of Rotors in Compressible Potential Flows.- On the Possibility of Singularities in the Acoustic Field of Supersonic Sources When BEM is Applied to a Wave Equation.- Boundary Element Methods in Probabilistic Acoustic Scattering Problems.- Structural Acoustics Applications of the BEM and the FEM.- A. B. E. — F. E. Coupled Acoustic Element for Fluid-Structure Interaction Problems.- Thermal Analysis.- Thermal Aspects of Metal Cutting: A Boundary Element Approach.- Summary of Modern Nodal Integral Methods in Fluid Flow and Heat Transfer.- Soil Mechanics/Wave Motions.- The Principle of “Limit Absorption” for Water Wave Diffraction.- A Laplace Transform Boundary Element Method for Axisymmetric Diffusion Problems.
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