海洋平台作为海洋石油和天然气开采的重要设施，近年来海洋平台的安全性备受关注。以粒子群优化算法（particle swarm optimization algorithm, PSO）对导管架的桩腿倾斜比例进行优化，利用SACS软件对桩基式海洋平台结构进行静态和动态分析，通过海洋导管架平台的位移响应、桩头点受力分析以及导管架杆件的UC值对比，得到了最优的腿部倾斜比例。同时分析了群桩与单桩对导管架极限承载力的影响，最终给出了导管架的结构优化设计方案，为桩基式海洋平台结构优化设计提供数据支持。

As an important facility for offshore oil and gas exploitation, the safety of offshore platforms has attracted much attention in recent years. PSO (particle swarm optimization algorithm) was used to optimize the tilt ratio of the pile legs of the jacket, and the static and dynamic analysis of the pile-based offshore platform structure was carried out by using offshore software, and the optimal leg tilt ratio was obtained through the displacement response of the offshore jacket platform, the force analysis of the pile head point and the comparison of the UC value of the jacket members. At the same time, the influence of pile group and single pile on the ultimate bearing capacity of the jacket was analyzed, and finally the structural optimization design scheme of the jacket was given, which provides data support for the structural optimization design of pile-based offshore platform.