导管架式海洋平台的MRFD半主动模糊控制理论研究

基于模糊理论控制采用磁流变阻尼器(MRFD)对海洋平台在规则波和随机波浪载荷、线性波和Stokes5节波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,并运用Morison方程实现了波浪力的数值仿真。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。基于MATLAB调用ANSYS软件,开发平台振动控制界面,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的半主动控制系统对海洋平台的动力响应有明显的控制效果。

Research on MRFD Semi-Active Fuzzy Control Theory of Jacket Offshore Platforms

A Magnetorheological Fluid Damper （MRFD） is adopted to control the vibra- tion of the offshore platforms under regular wave and random wave, linear wave and Stokes5 wave loads based on the fuzzy control theory is studied. Taking the displacement and velocity of platforms as the inputs variables, the caleulation means of the optimal control force is gave, and the numerical simulation of the wave force is calculated by Morison equation. Taking response amplitude of platforms structural vibration control as objectives, the MRFD system is designed optimally for controling the vibration platforms. Based on the MATLAB and AN- SYS, design a control interface for the platforms, a typical platform as an example to make it multi-degree-of-freedom numerical simulation. The simulation results show that MRFD semi- active vibration control system is obviously effective on the offshore platforms.