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《Journal of Vibration and Shock》 2015-16
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Dynamic reliability sensitivity analysis ofmega-sub control system based on response surface method

LI Xiang-xiu;TAN Ping;LIU Liang-kun;ZHANG Ying;ZHOU Fu-lin;School of Civil Engineering,Beijing University of Technology;Earthquake Engineering Research & Test Center,Guangzhou University;  
The equations of motion of a mega-sub control system were established when the sub-structure was modeled as a multi-degree of freedom system. The transfer function of the system was derived by using the complex modal theory. The ultimate state function was obtained by using the response surface method and then on the basis of the first passage mechanism of random vibration,the calculation method of dynamic reliability of the system was analyzed. Finally,the reliability sensitivity of the random parameters of the structure to story drift angle was analyzed when the ground motion was considered as a random excitation and the structure was considered to be in elastic state. The results indicate that the mean stiffness of substructure has poor sensitivities to story drift angle,while the sensitivities of the mean stiffness of main structure and the damping ratio of isolation layer to story drift angle are high.
【Fund】: 国家973项目(2011CB013606);; 国家基金委面上项目(51208129);; 国家教育部新世纪人才项目(NCET-11-0914);; 国家教育部博士点基金(20104410110002);; 广州市羊城学者科技计划项目(10A032D)
【CateGory Index】: TU311.2
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