关键词: 随机参数, 随机荷载, 桁架结构, 结构有限元分析, 可靠性分析

Abstract: This paper deals mainly with the analysis method of teh finite element and reliability for truss structures with random parameters under random loads action. The stochastic factors of the structural physical parameters, geometry dimensions and the stochastic loads applied on structures are considered respectively or simultaneously in the analysis. The algebra synthesis method is employed to obtain the computational expressions for the numerical characteristic of the structural responses(displacements and stresses). And then the reliability indexes of the structural responses are obtained. Finally, the rationality and the feasibility of the method are confirmed by an example.

Key words: random parameters, random loads, truss structures, structural finite element analysis, reliability analysis