蜂窝结构海上风力机防护装置性能研究

Honeycomb structure protection device of an offshore wind turbine

为便于风力机运输、安装及维护,海上风电场大多处于繁忙的航道,导致海上风力机受船舶碰撞概率大幅上升。为增强海上风力机抗撞能力,减轻碰撞区域受损程度,提高其抗风险性能,提出一种具有蜂窝结构特征的新型防护装置。采用显示动力分析软件LS-DYNA模拟5 000 t级船舶与4 MW海上风力机单立柱三桩基础碰撞过程,研究蜂窝结构新型防护装置与传统实心结构防护装置抗撞性能的差别。结果表明:具有蜂窝结构特征的新型防护装置可有效延长接触时间,降低接触力;较传统实心防护装置,新型装置内能转化能力提升15%以上,蜂窝结构起到提升内能转化能力的作用。蜂窝结构防护装置具备良好的吸能缓冲效果,可有效削减传递至风力机结构的内能及动能,降低基础损伤,起到提升单立柱三桩基础海上风力机安全性的功能。

In order to facilitate the transportation,installation and maintenance of wind turbines,offshore wind farms are mostly located in busy waterways,resulting in a significant increase of the probability of offshore wind turbines being collided by ships.In order to enhance the anti-collision ability of offshore wind turbines,reduce the damage degree of collision area and improve its anti-risk performance,a new type of protection device with honeycomb structure characteristics was proposed.The explicit dynamic analysis software LS-DYNA was used to simulate the collision process between a 5000 t ship and the tripod of a 4 MW offshore wind turbine,and the difference between the new honeycomb structure protection device and the traditional solid structure protection device was studied.The results show that the new protective device with honeycomb structure can effectively prolong the contact time and reduce the contact force.Compared with the traditional solid protection device,the internal energy conversion capacity of the new device is increased by more than 15%,and the honeycomb structure plays a marked role in improving the internal energy conversion capacity.The honeycomb structure protection device has a good energy absorption and buffering effect,which can effectively reduce the internal energy and kinetic energy transferred to the wind turbine structure,reduce the foundation damage,and improve the safety of the offshore wind turbine with tripod.