海上风力机在风浪地震激励下的振动控制研究

Study on vibration control of offshore wind turbines subjected to wind,waves and earthquake excitation

文中针对单桩式海上风力机在风、浪及地震载荷下的动力响应问题,采用单调谐质量阻尼器(STMD)及多重调谐质量阻尼器(MTMD)对其进行振动控制。通过SIMPACK建立了考虑桩-土耦合作用的风力机气-液-弹耦合仿真模型,并基于单纯形遗传编码算法对TMD系统参数进行了优化。为评估所设计的STMD和MTMD系统的减振性能,在泊机状态下进行了耦合仿真分析。结果表明,MTMD比STMD能更好地抑制风力机支撑结构的基频和高阶模态振动。结合安装的方便性和减振效果,可认为MTMD系统对处于地震活跃区的风力机具有显著的减振效果。

In this article,the single tuned mass damper(STMD)and the multiple tuned mass dampers(MTMD)system are used to control structural vibration of the single-pile offshore wind turbines subjected to wind,wave and earthquake loads.The wind turbine’s aero-hydro-elasticity coupling simulation model is set up with the help of SIMPACK,with pile-soil interaction taken into consideration;the TMD parameters are optimized by means of the simplex code genetic algorithm.In order to evaluate vibration-mitigation performance of STMD and MTMD,a series of simulation and analysis are carried out under the parked condition.The results show that MTMD can better suppress vibration at both the fundamental and high-order modes than STMD.With desirable installation convenience and vibration-mitigation performance,the MTMD system is considered to be more feasible for vibration mitigation of the wind turbines located in the regions characterized with active earthquake.