导管架平台桩基贯入深度的两级模糊模式优选模型

桩基础是海洋导管架平台结构中的重要组成部分，其贯入深度对海洋平台的造价和运营期间的安全性能起着重要的影响。本文在考虑桩－土之间相互作用非线性特性的基础上，采用非线性等效弹筑模拟海底土层对桩基的作用，对桩基进行有限元分析。由于影响海洋导管架平台桩基础贯入深度的因素很多，而且有些因素带有很大的模糊性，本文采用两级模糊模式优选模型对影响因素进行综合评判，最后得出了适合给定荷载和海底地条件下最为合理的桩基贯入深度方案，具有一定的工程应用价值。

Dual-pole fuzzy pattern optimum selection model for penteration depth of jacket platform

The pile foundation is an important component of the offshore jacket platform,the penetration depth of which imposes vital influence on the cost and security of the platform.Based on the consideration of the pile-soil nonlinear interaction,nonlinear equivalent spring is introduced in this paper to simulate the action of soil on piles. The finite element analysis is carried out on the pile foundation.Because there are many factors,including some fuzzy ones influencing the penetration depth of the pile foundation,the dual-Pole Fuzzy Pattern Optimum Selection Model is applied. At the end,a feasible penetration depth scheme fitting given load and seabed conditions is achieved,which is valuable to engineering application.