【摘要】 本文探讨了弹塑性耦合算法(边界元与有限元结合)的若干问题,给出了体力积分化为边界积分后的边界元法的基本计算公式。详细分析了“面力不连续问题”并提出了有效的处理方法。在对FE和BE两类区域的结合作详细讨论后,由功的协调条件导出了荷载转换矩阵。在产生明显塑性变形的区域用弹塑性有限元分析,并提出了加速收敛的有效方法——预测中点刚度迭代法。最后,用自编的弹塑性耦合算法程序(EPBFM)对复杂地基上的重力坝作了应力分析。更多还原

【Abstract】 This paper discusses the elastoplastic coupling calculation method, gives basic calculation formulas for BEM used in the case when body force integration is changed into boundary integration, analyzes in detail the uncontinuity problem of surface forces and puts forward an efficient treatment method. The elastoplastic FEM analysis is used for domains with obvious plastic deformation. An accelerating convergence method, i.e., the iterative method of the predicted central rigidity,is put forward. At the end of the paper, an example is given to show the stress analysis of a gravity dam on a complicated foundation using the authors’ computer program of elastoplastic coupling calculation method (EPBFM).更多还原