空间桁架动力弹塑性计算缩减方法精度分析

Precision Analysis of Elastoplastic Dynamic Reduction Method of the Space Trusses

应用Newmark方法编制了空间网架动力弹塑性动力响应分析程序；改进并得出了一种动力缩减方法──考虑静残余的荷载相关Ritz矢量方法，编制了相应的弹塑性动力响应分析程序；为了检验缩减方法（Lcad－dependentRitzVectorsNewmark）的计算精度。用2种方法对同一空间桁架结构进行了计算，结果表明缩减方法具有较好的精度和可靠性。

In this paper, based on Newmark method, an elastoplastic dynamic analysis software for space truss structures was developed first. Then,to improve the efficiency of the analysis process, a dynamic reduction method- Load - dependent Ritz Vectors has been introduced into the calculation of the elastoplastic dynamic response in which the static residuces were considered. The iterative procedure has been presented and a new program has been developed. To test the precision of the new method,a space truss has been computed in comparision with the Newmark method. The results show that this Load -depentent Ritz Vectors Newmark method is good in efficiency and has high precision and reliability at the same time.