大型结构的失效分析

 用半模加虚元法计算大型结构元件的破坏问题,只限于对称的破坏型式,非对称的破坏分析,如用虚元法,必须建立全结构模型。本文旨在将结构的刚度变化问题,转化为力的变化问題,固定原有的结构刚度,用等效附加力来替代破坏元件的刚度效应,以达到用半模解大型结构元件非对称破坏问题的目的。

A METHOD OF FAILURE ANALYSIS OF COMPLICATED STRUCTURES

The method of semi-model with virtual element is only limited tosymme-trical failure type of structures. It's necessary to establish an all-model structure when unsymmetrical failure of structures is analysed by using virtual element method. The aim of this paper is to make an equivalence between the variety of the structural rigidity and the variety of external force. In order to solve unsymmetrical failure problem of complicated structure by semi-model we assume that the original rigidity of the structure keeps constant and the equivalent additional force are a substitute for the rigidity effect of the failure elements. It is not only simple but also economical that the equivalent additional force of the failure element in the structures and structural failure analysis could be solved by means of "the method of dummy force". Besides, this method can be applied to analyse the design, the improvement and the failure for other structures.