为探究不同海况及伺服系统下单桩式近海风力机的地震易损性，以DTU 10 MW风力机为研究对象，建立风浪相关的地震-湍流风-波浪多物理场模型，研究其在变速变桨伺服系统下的动力特性，基于增量动力分析方法评估其地震易损性。结果表明：变速变桨伺服系统可有效缓解风力机高风速下无地震作用时的塔顶振动；当风轮在大推力下，较小的波浪载荷一定程度上可降低风力机塔顶振动及塔底弯矩；随地震动强度增加，风力机各临界损伤状态失效概率逐渐增加；风力机地震易损性主要由地震动强度决定，波浪载荷与湍流风载荷对风力机地震易损性影响较小。

To research the seismic fragility of monopile offshore wind turbines under different sea conditions and servo system action, taking the DTU 10 MW wind turbine as research object, a windwave related seismicturbulent windwave multiphysics field model was established to study its dynamic characteristics under the variable speed and variable pitch servo system and evaluate its seismic fragility based on incremental dynamic analysis method. The results show that the variable speed and variable pitch servo system can effectively mitigate the tower top vibration of wind turbine at high wind speed without seismic effect; when the wind turbine is under large thrust, the smaller wave load can reduce the tower top vibration and tower bottom bending moment to a certain extent; as the seismic vibration intensity increases, the probability of failure of each critical damage state of the wind turbine gradually increases; the seismic fragility of the wind turbine is mainly determined by the seismic vibration intensity, and the wave load and turbulent wind load have less influence on the seismic fragility of the wind turbine.

TK221

国家自然科学基金资助项目（51976131，52006148，52106262）；上海市“科技创新行动计划”地方院校能力建设资助项目（19060502200）