空间桁架动力弹塑性计算缩减方法精度分析

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。

Precision Analysis of Elastoplastic Dynamic Reduction Method of the Space Trusses

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.