有限元非线性静动力分析程序SAP7的几点改进

Some Improvements on the Program SAP7 for the Static and Dynamic Nonlinear FEM Analysis

本文对有限元非线性静动力分析程序SAP7作了几点改进,增设了非线性方程组的带形稀疏拟牛顿BFGS算法、三维问题Mises材料模型和面载荷生成模块,实例表明,这一系列实质性的工作使程序的功能和效率得到明显增强与提高。

In this paper, some improvements on the Program SAP7 for the static and dynamic nonlinear Finite Element Method analysis are given. By efforts of the authors, on the original SAP7 Program, it is added: the sparse bandwidth quasi-Newton BFGS algorithm of nonlinear equation system, the Mises material module for three -dimensional program, the module for the automatic, generation of surface load etc. Through examples of computation it may be seen that the function and the efficiency of the Program SAP7 are obviously improved.