以近海DTU 10 MW大型单桩式风力机为研究对象，利用Kaimal风谱模型与P-M谱分别建立湍流风场并定义波浪分布，基于绕射理论计算波浪载荷。选用东海某风电场土壤参数建立桩-土耦合效应模型，对比分析风浪载荷下基于不同桩-土耦合效应的风力机动力学响应、疲劳寿命及稳定性。结果表明：桩-土耦合效应对风浪载荷下风力机动力学响应起阻尼作用，将大幅降低其动力学响应，在抗风浪研究中，桩-土耦合效应不可忽略，否则将过度估计动力学响应；基于线性桩-土耦合效应与非线性桩-土耦合效应的风力机动力学响应、疲劳损伤及1阶屈曲因子相差较小，而较之于非线性桩-土耦合效应，风浪联合作用下多土层桩-土耦合效应风力机动力学响应略剧烈，疲劳寿命及1阶屈曲因子略小。

Taking offshore largescale DTU 10 MW monopile wind turbine as the research target, Kaimal wind spectrum model and PM spectrum were used to establish turbulent wind field and define wave distribution respectively, and the wave load was calculated based on diffraction theory. Soil parameters of a wind farm in the East China Sea were selected to establish pilesoil coupling effect model. The dynamic responses, fatigue life and stability of wind turbine under wind wave load based on different pilesoil coupling effects were comparatively analyzed. The results show that the pilesoil coupling effect has a damping impact on the dynamic response of wind turbine under wind wave load, which will greatly reduce its dynamic response. The pilesoil coupling effect cannot be ignored in the study of wind wave resistance, otherwise the dynamic response will be overestimated. The dynamic response, fatigue damage and firstorder buckling factor of wind turnine based on pilesoil linear coupling effect and pilesoil nonlinear coupling effect are relatively smaller. Compared with the pilesoil nonlinear coupling effect, the wind turbine dynamic response fluctuates severely based on the pilesoil coupling effect of multisoil layer under the joint action of wind wave, while the fatigue life and firstorder buckling factor change slightly.

TK83

国家自然科学基金（51976131，51676131，52006148）；上海市“科技创新行动计划”地方院校能力建设项目（19060502200）