摘要
本文将摄动、边界元、有限元方法结合起来,提出一种求解线性蠕变问题的新方法。该方法不采用一般增量法中在一个时段内各物理量保持不变或作线性变化的假设,加大了计算步长提高了精度。文中构造了边界元摄动格式,构造了包含钢筋在内的边界元有限元耦合摄动格式,并给出了满意的数值结果。
By virtue of marriage of perturbation and boundary-finite element methods, A new approach is presented in this paper for solving the problem of linear creep.Due to the assumption that physical variables remain constant in a divided time interval is not adopted in the approach, the length of time step could be larger and computing accuracy could be increased.The perturbation form for boundary and boundary-finite element which includs reinforcement in it is established.Numerical validation of proposed approach against analytical solution is also favourablely given.
基金
中国科学院地质研究所开放实验室的资助
关键词
蠕变
摄动
边界元
有限元
creep
perturbation
boundary elemcnt
finite element
