基于模糊理论海洋平台的MRFD半主动控制理论研究

基于模糊理论控制采用磁流变阻尼器（MRFD）对海洋平台在随机波浪力作用下的振动控制效果进行研究。以平台的位移、速度响应为输入量，给出最优控制力的计算方法，并基于线性波浪理论和Morison方程实现了随机波浪力的数值仿真。以平台结构振动响应幅度为控制目标，设计MRFD系统，实现对海洋平台的最优控制。以典型导管架平台为例，进行多自由度数值仿真，仿真结果表明模糊控制下MRFD的半主动控制对海洋平台的动力响应有明显的控制效果。

STUDY ABOUT MRFD SEMI-ACTIVE VIBRATION CONTROL FOR OFFSHORE PLATFORMS BASED ON FUZZY CONTROL THEORY

A magneto rheological fluid damper （MRFD） is adopted to control the vibration of offshore platform under random wave loads and its control effect is studied. Taking the displacement and velocity of platform as the inputs variables, combine with optimal control calculated methods, and based on the linear wave theory and the Morison equation, then the numerical simulation of the random wave force is calculated. The MRFD is designed optimally for controlling the vibration platform. A multi-degree-of-freedom numerical example applied to typical jacket platforms and the results show that MRFD semi-active vibration control system is effective for the offshore platforms.