%0 Journal Article
%T TIME-DOMAIN AVERAGING OF PRECISE INTEGRATION AND STOCHASTIC SYSTEMORDER-EXPANSION METHOD<br>精细积分时域平均法和随机扩阶系统法
%A Zhang Senwen
%A Cao Kaibin
%A Chen Kuifu
%A <br>张森文
%A 曹开彬
%A 陈奎孚
%J 力学学报
%D 2000
%I 
%X The direct integration methods in time domain for dynamic response computation of stochastic parameter structures subjected to random excitation were investigated in this paper. At first, based on High Precise Integration (HPI) method, which was developed originally for linear and deterministic system, a Time-domain Averaging Scheme of HPI (TAPIM) was developed to calculate the dynamic response of deterministic structure subjected to random excitation. In the second part of the paper, by using of Stochastic Finite Element Method (SFEM) combined with System Order-expanded Method (SOM), the system dynamic equation were obtained for an uncertain system with stochastic structural parameters, then the TAPIM was used to obtain the stochastic response of the system. Some numerical examples were given, including a two-degree of freedom linear system and a cantilever beam with stochastic structural parameters. Furthermore, a non-linear system of TDOF was computed combined with the statistical linearization method. The results showed that the integrated method of TAPIM, SFEM, and SOM can be used to compute the stochastic dynamic response of uncertain structure, the accuracy and efficiency of computation are much better than other traditional numerical integration methods.
%K time-domain averaging
%K random vibration
%K stochastic order expansion
%K stochastic finite element
%K dynamic response<br>随机参数结构
%K 精细积分时域平均
%K 随机扩阶系统
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=5D344E2AD54D14F8&jid=4100DA4A1A3BA1B0CE5AD99AE1DFB420&aid=D86D14AEE92C9768&yid=9806D0D4EAA9BED3&vid=9971A5E270697F23&iid=0B39A22176CE99FB&sid=AC1578C6BB9EBDEF&eid=2BA123C6EB9D54C2&journal_id=0459-1879&journal_name=力学学报&referenced_num=2&reference_num=7