组合结构强度与稳定性计算

 本文用有限元素法和对于几何非线性结构问题的增量法求解组合结构强度与稳定性问题。结构元素包括杆元、平面梁元、空间梁元、平面三角板元、平面矩形板元和弯曲矩形板元等。粱与板杆之间的协调采用无限刚性元处理的方法。在用联立迭代法求解广义特征值问题时,可由随机数自动产生初始试验向量。文中还叙述了计算过程中的一些处理技巧,并给出了几个数值例子。 计算程序用标准的FORTRAN Ⅳ语言编制,具有计算时间短,通用性强,使用方便等特点。

COMPUTATION OF STRENGTH AND STABILITY FOR A BUILT STRUCTURE

This paper is devoted to solving strength and stability problems of a built structure by using the finite element method and the increment method for the geometrical nonlinear structural problem. Structural elements contain bar, plane beam, space beam, triangular and rectangular plates with membrane stresses, rectangular plate element with bending deformations. Harmonization between platebar and beam is carried out by using infinitely stiff component. When generalized eigenvalue problem is solved with the aid of a simultaneous iteration algorithm, the initial test vector may be automatically generated by means of random numbers. In the paper some techniques in computational procedure are also described, and a few numerical examples are given.We have written a general purpose program in FORTRAN IV language. The program possesses the advantages of short computing time, good generality and convenience for use.