Titlebook: IUTAM Symposium on Computational Methods for Unbounded Domains; Thomas L. Geers Book 1998 Springer Science+Business Media B.V. 1998 3D.Ana

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Calculation of Transient Response of Viscoelastic Unbounded Domains by Direct Boundary Element MethIntegral Equations (BIE) in time domain with the Boundary Element Method (BEM). Thus, the spatial problem dimension is reduced by one. Viscoelastic constitutive behaviour is implemented by means of a Laplace transform technique based on an elastic-viscoelastic correspondence principle. The concept o

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Reduction of the Complexity of the Intrisically Nonlinear Problem of Aerodynamic Sound Generation ilem is inherently nonlinear, a unique splitting of the field quantities into acoustic, vortical, and entropy modes exists. The splitting for the nonlinear case is formally produced with projection operators, and as such, the method described in this paper for determining the acoustic portion of a co

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Exact and High-Order Boundary Conditions in the Time Domain,l solution of scattering problems in the time domain. An impressive number of schemes have been proposed to overcome this difficulty. Nonetheless, the ideal of solving the problem on a fixed domain and achieving convergence by some systematic improvement of the boundary treatment and/or simple mesh

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Benchmark Problems,The participants of the Symposium on Computational Methods for Unbounded Domains formed four working groups of nine members each to work in parallel on benchmark problems. Each group presented its benchmark candidates to the assembly of participants, which initiated a process of consolidation

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Absorbing Boundaries for Acoustic Wave Propagation Problems,In this article we present a summary of recent efforts at Carnegie Mellon University devoted to the development of efficient and accurate finite element procedures for the analysis in the frequency and time domains of large-scale acoustic and other wave propagation problems in unbounded domains.

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Singly and Doubly Asymptotic Computational Boundaries,The class of problems addressed in this symposium involves the numerical computation of wave fields in and/or around a body residing within an unbounded domain. Each of these problems may be regarded as one of the following types:

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Optimal Local Artificial Boundary Conditions,One of the methods commonly used to numerically solve a problem in an infinite domain is the method of . [1]. For a linear scalar problem, this method may be summarized as follows: