海上风力机橡胶及泡沫铝材料防护装置性能研究

Study on Performance of Rubber and Aluminum Foam Protective Device for Offshore Wind Turbine

为研究不同本构橡胶与泡沫铝材料用于海上风力机防护装置的抗撞能力,基于非线性动力学理论,采用LS-DYNA软件模拟吃水量5 000 t船舶低速撞击装配主体材料分别为Ogden橡胶、Mooney-Rivlin橡胶及Aluminum foam泡沫铝防护装置的4 MW单立柱三桩基础海上风力机过程,对接触力、撞深、能量耗散、损伤及塔顶运动进行分析。结果表明:Aluminum foam较Ogden与Mooney-Rivlin材料防护装置可降低最大接触力与最大撞深,其疏松多孔结构可吸收大量能量且降低反弹动能;在Aluminum foam材料保护下风力机塔架塑性变形与塔顶正向位移更小,安全性更高。

In order to study the anti-collision ability of different constitutive rubber and aluminum foam materials used in offshore wind turbine protective device, based on nonlinear dynamics theory, a 4 MW single-column tripod foundation offshore wind turbine assembled with protective devices made from Ogden, Mooney-Rivlin and aluminum foam body materials in 5 000 t draft weight ship’s low speed impact process was simulated by the LS-DYNA software, to analyze the contact force, impact depth, energy dissipation, damage and tower top motion.The results show that the maximum contact force and maximum impact depth of aluminum foam can be reduced compared with Ogden and Mooney-Rivlin material protective devices.Due to the loose and porous structure of aluminum foam, a large amount of energy can be absorbed and the rebound kinetic energy can be reduced.Under the protection of aluminum foam material, the plastic deformation of tower and the impact displacement of the tower top are smaller and the safety is higher.