Multi-domain BEM for two-dimensional problems of elastodynamics. (English) Zbl 0631.73067

An advanced implementation of the boundary element technique for the periodic and transient dynamic analyses of two-dimensional elastic or viscoelastic solids of arbitrary shape and connectivity is presented. For transient dynamic analysis the problem is first solved in the Laplace transform space and then the time domain solutions are obtained by numerical inversion of transformed domain solutions. The present analysis is capable of treating very large, multi-domain problems by substructuring and satisfying the equilibrium and compatibilities at the interfaces. With the help of this substructuring capability, problems related to the layered media and soil-structure interaction can all be analyzed. This paper also introduces a new type of element called ‘enclosing element’, which has been developed and used to model the infinitely extending boundaries of a half-space or a layered medium. A number of numerical examples are presented, and through comparisons with available analytical and numerical results, the accuracy, stability and efficiency of the present analysis are established.


74S30 Other numerical methods in solid mechanics (MSC2010)
65R20 Numerical methods for integral equations
74H45 Vibrations in dynamical problems in solid mechanics
65R10 Numerical methods for integral transforms


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