Multi-Region Condensational Boundary Element Method for Analysis of Three Dimensional Elastostatics
Zhang Xiaosong,                                         Ye Tianqi
(Shi jiazhuang Railway Institute, 050043£©,(Northwestern Po lytechnical University, 710072£©

Abstract: In this paper, superparametric discontinuous boundary elements are developed to discretizeboundary integral equations and applied to multiregion condensational boundary element analysis of three-dimensional elastostatics. The triangular coordinate transformation is employed to evaluate the related singular integrals. By virture of the discontinuous elements, the freedom constraint is circumvente din multi-region boundary element analysis. A two-level condensational proced ure is presented to improve efficiency of multiregion analysis. The presented approach also provides a feasible way for parallelization of three-dimensional bo undary element analysis.
Keywords: freedom constraint, superparametric discontinuous elements, multi-region condensational BEM,two-level condensation al procedure.