Reliability Assessment and Optimization of Double Random Vibration Systems based on PDEM
[摘要] The dynamic responses analysis method of structure with random parameters under stochastic seismic loads is proposed. The generalized probability density evolution equation for compound stochastic process is solved by the finite difference method. Then, for the first passage criterion, the dynamic reliability is analysed by establishing the one-dimensional integral in safe domain and the absorbing boundary condition. A new optimization method is coming up combining improved genetic algorithm and PDEM. Taking the parameters optimization of a three-story floor-shear frame structure with TMD under random seismic loads as an example, the correctness of the proposed method is verified by comparing interlayer displacement response and dynamic reliability.
[发布日期] [发布机构] Yunnan University, Kunming; 650500, China^1;Guangxi Key Laboratory of Disaster Prevention and Engineering Safety, Guangxi University, Nanning; 530004, China^2
[效力级别] 机械制造 [学科分类]
[关键词] Absorbing boundary condition;Double random vibration systems;Interlayer displacements;Parameters optimization;Probability density evolution equation;Reliability assessments;Shear frame structures;Stochastic seismic loads [时效性]
