中文摘要：

在JZ20-2北高点井口平台加设带浮箱装置的摇摆柱,利用ANSYS有限元软件对整体结构进行了地震荷载作用下的仿真分析,计算分析了不同摇摆柱刚度、不同浮箱位置、不同浮力等情况下平台节点最大位移和最大加速度反应.数据分析表明,摇摆柱刚度是影响海洋平台抗振性能的最主要因素,浮箱可以有效地减小海洋平台动力反应,具有一定的减振效果.

英文摘要：

With self-recentering rocking column used in JZ20-2 platform,this paper makes a simulation analysis of the whole platform structure subjected to earthquake load by the finite element software ANSYS,then analyzes the nodes＇ maximum displacement and maximum acceleration responses under the condition of different platform rocking column stiffness,different floating box＇s location and different buoyancy cases.The results show that stiffness of rocking column is the main factor affecting the seismic performance of offshore platforms,floating box can effectively reduce the dynamic response of offshore platform.