基于梁杆结构的稳定性分析提出了结构稳定优化的概念。
A concept of structure stability optimization is described on the basis of beam member structure stability analysis.
由二阶理论建立了梁杆结构分析的精确几何非线性有限元增量平衡方程，并利用精确有限元方法对一些典型结构进行了稳定性分析。
Accurate geometry! Non linear finite element increment equilibrium equation is set up by two orders theory. Typical structure stability is analyzed with this accurate finite element method.
本文介绍了对由杆、膜、梁、板壳单元组成的工程结构可进行实际设计的程序系统DDDU。
The program system DDDU for actual design of engineering structures composed of bar, diaphragm, beam, shell, etc. is introduced.
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