为探究单桩及三桩式海上风力机在不同风载荷及地震载荷作用下动力学响应的差异，以DTU 10 MW风力机为研究对象，考虑湍流风及地震载荷作用，基于p-y曲线法及Winkler土-构相互作用理论，构建土-构耦合模型，开展单桩及三桩式海上风力机动力学响应比较研究。结果表明：在湍流风作用下，三桩式风力机较单桩式塔顶位移峰值响应较小，结构更稳定；单桩式风力机呈局部小应力、整体大应力现象；而三桩式风力机呈局部大应力，整体小应力现象。在湍流风与地震载荷联合作用下，三桩式风力机相较于单桩式位移峰值受地震载荷影响波动较大，但其在不同风速及不同强度地震作用下峰值节点位移总体仍小于单桩式。

In order to investigate the difference of dynamic responses between monopile and tripod offshore wind turbines under different wind and seismic loads, the DTU 10 MW wind turbine was used as the research object to consider the action of turbulent wind and seismic load, construct the soilstructure coupling model based on the py curve method and Winkler′s soilstructure interaction theory,and conduct a comparative study on the dynamic response of monopile and tripod offshore wind turbines. The results show that the peak displacement response of the tripod wind turbine is smaller and more stable than that of the monopile tower under the action of turbulent wind.The monopile wind turbine exhibits small local stress and large overall stress, while the tripod wind turbine exhibits large local stress and small overall stress. Under the combined effect of turbulent wind and seismic load, the peak displacement of the tripod wind turbine fluctuates more largely under the influence of seismic load compared with the monopile type, but its peak nodal displacement under different wind speeds and seismic effects of different intensities is still smaller than that of the monopile type in general.

TK221

国家自然科学基金项目（51976131，52006148）；上海市"科技创新行动计划"地方院校能力建设项目（19060502200）