有限元结构分析程序中构件整体稳定性计算模块的研制

The Calculating Programme of Members' Internal Stability in FEM

本文根据《起重机设计规范》中双向压弯构件稳定性计算的一般方法,计论了在有限元程序中需要考虑的关键内容,尤其是对变截面构件的计算处理,给出了一套变截面长度系数的算法,可使应用程序在整体稳定性计算方面有所突破。最后,文章给出了程序结构,按此过程编程可接入任何布限元程序系统,从而满足工程计算的需要。

Based on the general method to determine the stability of members in compression and bending offered by DESIGN RULES FOR CRANES, this paper discusses some key problems in compiling the calculating programme for FEM, and develops a set of algorithms to the effective length factors for members with varying cross-sections. Furthermore, the structure of the any programme is given for users to compile corresponding programmes for finite element system to meet the demands of engineering calculation.