Reliability Assessment and Optimization of Double Random Vibration Systems based on PDEM

2018 5th International Conference on Advanced Materials, Mechanics and Structural Engineering

材料科学;机械制造;土木建筑工程

Wang, X.J.^1^2 ; Yang, S.Z.^1^2 ; Wang, X.^1 ; Xiang, M.J.^1 ; Long, S.Q.^1 ; Dong, Y.Q.^1 ; Zhou, X.F.^1

Yunnan University, Kunming

650500, China^1

Guangxi Key Laboratory of Disaster Prevention and Engineering Safety, Guangxi University, Nanning

530004, China^2

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;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/473/1/012003/pdf
DOI  :  10.1088/1757-899X/473/1/012003

来源: IOP

【 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.