摘 要：采用非线性有限元软件LS-DYNA模拟5 000 t的船舶与3 MW单柱式海上风力机碰撞过程，并采用复合地基反力法描述碰撞过程中土壤与桩相互作用，研究土壤与桩相互作用及船舶碰撞速度对海上风力机碰撞过程的影响，对比分析了碰撞力及海上风力机结构动力响应。研究表明：船舶最大碰撞力随着碰撞角度增大而减小，随着碰撞速度增大而增大；随着船舶碰撞速度增大单柱式海上风力机与船舶碰撞区域塑性变形逐渐增大；船舶碰撞速度增大到3 m/s时，风力机桩底产生塑性变形，继续增大到7 m/s时，风力机桩底产生塑性失效。

Abstract:The non-linear finite element software LS-DYNA was used to simulate the process of a 5 000-ton ship to collide with a 3 MW mono-pillar type wind turbine and the compound foundation reaction force method was employed to depict the interaction between the soil body and the pile.On this basis,the interaction of the soil body and the pile as well as the influence of the speed of a ship in collision on the collision process with an offshore wind turbine were studied and the collision force and the dynamic response of the structure of the offshore wind turbine were analyzed and contrasted.It has been found that the maximum collision force of the ship will decrease with an increase of the collision angle and will increase with an increase of the collision speed.With an increase of the collision speed of the ship,the plastic deformation in the collision domain of the monopillar type offshore wind turbine and the ship will gradually increase.When the collision speed of the ship increases to 3 m/s,a plastic deformation will happen at the bottom of the pile for the wind turbine.When the said collision speed of the ship goes on increasing to 7 m/s ,a plastic failure will occur at the bottom of the pile for the wind turbine.

TM623.7

国家自然科学基金（51676131，51176129）