非连续边界元-有限元耦合方法分析

ANALYSIS OF DISCONTINUOUS BEM FEM COUPLING PROCEDURE

对边界元－有限元耦合方法进行了分析，采用非连续元离散边界积分方程，解决了耦合分析中自由度约束问题，给出了非连续边界元同有限元耦合的具体实施步骤，通过对二维弹性力学和流－固耦合问题分析，表明了该文方法的有效性．

This paper is devoted to the analysis of discontinuous BEM FEM coupling procedure. Discontinuous element is employed for the discretization of boundary integral equation to circumvent freedom constraints in coupling approach. Coupling scheme associated with discontinuous boundary elements is discussed in detail. Several techniques for solving coupled algebraic equations are implemented in the program developed by the authors. It is illustrated from the numerical results of 2 D elastostatics and transient response for fluid structure interaction, that the proposed procedure is feasible and efficient.