开发了风力机地震仿真平台SAF（Seismic Analysis Framework），以DTU 10 MW海上风力机为研究对象，建立其地震激励下的动力仿真模型，分析4种水深（20~50 m）时20组不同强度地震、额定风速湍流风与波浪流联合作用下风力机塔架动力响应。研究表明：地震作用对横向塔顶位移及横向平面内的塔基弯矩影响较大，来流方向塔顶位移及来流平面内的塔基弯矩主要受湍流风影响；在存在地震激励时，塔架不同高度处位移、剪切力及弯矩响应均大于湍流风与波浪流作用时；地震强度较弱时，不同水深处风力机塔顶位移与弯矩差距较小，但塔基弯矩随着水深的增大而增大；地震强度较大时，水深对风力机塔顶位移与塔基弯矩影响很大，相同地震强度的响应深水大于浅水。

The Seismic Analysis Framework (SAF) was developed.The DTU 10 MW offshore wind turbine was used as the research object.The dynamic simulation model under seismic excitation was established to analyze 20 groups of different intensity earthquakes under four water depths (20-50 m).The dynamic response of the wind turbine tower under the combined action of rated wind speed turbulent wind and wave current.The study shows that the seismic action has a great influence on the lateral top displacement and the tower base bending moment in the transverse plane.The tower top displacement in the inflow direction and the tower base bending moment in the inflow plane are mainly affected by the turbulent wind.In the presence of seismic excitation,the displacement,shear force and bending moment response at different heights of the tower are greater than those with only turbulent wind and wave current.When the earthquake intensity is weak,the difference between the top displacement and the bending moment of the wind turbine at different water depths is small.However,the bending moment of the tower base increases with the increase of water depth.When the earthquake intensity is large,the water depth has a great influence on the top displacement of the wind turbine and the bending moment of the tower foundation,and the response of the same earthquake intensity is greater than that of the shallow water.

TK83

国家自然科学基金（51676131，51176129）；国际（地区）合作与交流项目（51811530315）