结构局部非线性的通用有效算法

GENERNAL AND EFFICIENT ALGORITHM OF STRUCTURAL SYSTEM WITH LOCAL NONLINEARITY

对于工程中常见的弹塑性接触问题和结构具有两个（或两个以上）塑性区扩展的局部非线性问题，本文提出一种合理地结合子结构技术和带有给定位移处理的顺序逆序修正法的新算法。算法概念明确、编程方便、对求解效率有显著提高。文中算例证明了算法的有效性。

Elastoplastic contact problems and elastoplastic problems with two or more plastic zones are often encountered in engineering analysis. A new algorithm combining substituting technique with Positive-Negative Sequence Modification Method with prescribed displacements was proposed in this paper. The concept of this algorithm is clear, the design of its program is easy and the efficiency of solving problems is improved considerably. Examples are given to verify its effectiveness.