THE EXPANDED ORDER SYSTEM METHOD OF COMBINED RANDOM VIBRATION ANALYSIS
复合随机振动分析的扩阶系统方法

A new approach is developed for combined vibration analysis of stochastic structural system with random excitations. it is based on the idea of subspace orthogonal decomposition of response of stochastic structural system. By applying orthogonal expand approach about field domain random variables in random space, a set of expanded system equations about original structural system is presented. This then supplies the possibility of solving the dynamic equations using various traditional random vibration methods. In particular, this paper gives the procedure of using model analysis method. The validity of the proposed method is demonstrated by comparing with the results of random simulationmethod.