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

作　　者：何洪明[1] 杜喜凯[1] 李停驰[2] 夏亨熹[1] 

机构地区：[1]河北农业大学,保定071001 [2]中国人民银行保定分行,保定071000

出　　处：《河北农业大学学报》1997年第2期93-98,共6页Journal of Hebei Agricultural University

摘　　要：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.

关 键 词：桁架 空间桁架 动力弹塑性 缩减法 

分 类 号：TU323.4[建筑科学—结构工程]