航空学报 > 1992, Vol. 13 Issue (3): 128-132

大型结构的失效分析

魏建邱   

  1. 西安72信箱303分箱 西安 710089
  • 收稿日期:1990-03-31 修回日期:1991-03-25 出版日期:1992-03-25 发布日期:1992-03-25

A METHOD OF FAILURE ANALYSIS OF COMPLICATED STRUCTURES

Wei Jian-qiu   

  1. Box 72-303 of Xi'an, Xi'an, 710089
  • Received:1990-03-31 Revised:1991-03-25 Online:1992-03-25 Published:1992-03-25

摘要:

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。

关键词: 半模, 虚元法, 等效附加力, 拟力法, 失效元件, 力的分配系数

Abstract:

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.

Key words: semi-model, the method of virtual element, equivalent addition iorce, the method of dummy force, failure element, distribution factor of force