基于相似模型的导管架平台波浪载荷数值模拟

摘要

To ensure offshore platform working in production safely in the marine environment, the research on numerical simulation method of wave load and the static/dynamic response of plat-form under the wave-current coupling load was conducted.A similar model of a jacket platform was taken as an example.The numerical model and simulation analysis of the static/dynamic re-sponse of platform under the wave-current coupling load was completed with the Stokes 5th order wave theory and finite element method.The result indicated that the structure presented a similar periodic reciprocating motion under the action of wave load;the period was in accordance with wave period;the response value varies with different positions of the structure;the response in-creased gradually from the mud line to the top of the platform;the apparent deformation appeared on the deck of the platform and the maximum stress appeared at the bottom of the leg.This re-search aims to provide a reference for practical engineering application and safety diagnosis.%为确保海洋平台在海浪环境下的安全生产，研究波浪载荷的数值模拟方法及波流耦合作用下平台结构的静动力响应。以导管架平台相似模型为例，应用有限元法，根据5阶 Stokes 波浪理论，对平台在波浪载荷作用下的静动力响应进行了数值建模和仿真分析。结果表明：在波浪载荷作用下，平台结构产生类周期往复运动，周期与波浪周期基本一致；平台不同位置的响应值不同，从泥线至平台顶端，响应值逐渐增大；平台甲板结构变形明显，最大应力出现在桩腿底部位置。为实际工程应用和安全诊断提供参考。