地震激励严重威胁风力机正常稳定运行，以丹麦科技大学（DTU）与Vestas公司联合研发的DTU 10 MW风力机为研究对象，考虑海床土壤柔性，基于有限元及p-y曲线法，研究风力机塔架在3种实测地震激励作用下的瞬态动力学响应。结果表明：强震级、长时间的地震激励对塔架造成严重破坏；地震发生时塔顶位移最大、应变能集中于塔基；塔顶振动方向、形变位置、剪切应力及应变能集中区域因地震加速度的方向大小而改变。

The normal operation of wind turbines is seriously threatened by earthquake,therefore,the objective of this work is to study the transient dynamic response of the DTU 10 MW wind turbine that is deeply buried in the flexible soil under the seabed,which was jointly developed by the Danish Technical University (DTU) and Vestas,under three different seismic excitations,and the finite element and p-y curve are employed.The earthquake with high magnitude and long time causes serious damage to the tower.The top displacement of the tower is the largest when the earthquake occurs,and the strain energy is concentrated on the tower foundation.The displacement direction of the tower top,deformation position,shear,and the position of maximum shear stress and strain energy change with the direction of seismic acceleration.

TK83

国家自然科学基金（51676131）；国际(地区)合作与交流项目（51811530315）；上海市“科技创新行动计划”地方院校能力建设项目（19060502200）