Accession Number : ADA192931

Title :   Off-Boundary Approach to the Boundary Element Method.

Descriptive Note : Interim rept.,

Corporate Author : NORTHWESTERN UNIV EVANSTON IL STRUCTURAL MECHANICS LAB

Personal Author(s) : Achenbach, J D ; Kechter, G E ; Xu, Y -L

PDF Url : ADA192931

Report Date : 15 Feb 1988

Pagination or Media Count : 23

Abstract : This paper is concerned with scattering of time-harmonic waves by compact inhomogeneities in an elastic solid. In the calculation procedure a boundary integral equation is solved numerically by the boundary element method (BEM). An alternative to the usual boundary element method is employed. The alternative approach is applicable to cavities or fixed rigid bodies of general shape located in linearly elastic, isotropic, homogeneous solids, but the specific results reported herein are for spherical cavities. The alternative approach eliminates the cumbersome singularities associated with the usual approach to BEM, and it also eliminates the problems encountered at the so called fictitious eigenfrequencies.

Descriptors :   *INTEGRAL EQUATIONS, *BOUNDARY VALUE PROBLEMS, BOUNDARIES, COMPUTATIONS, ELASTIC PROPERTIES, FREQUENCY, HARMONICS, HETEROGENEITY, HOMOGENEITY, ISOTROPISM, NUMERICAL METHODS AND PROCEDURES, OSCILLATION, RIGIDITY, SCATTERING, SHAPE, SOLIDS, TIME, VIBRATION, WAVES, MECHANICS

Subject Categories : Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE