为研究与结构接触表面不平整浮冰导致的冰激振动对风力机影响，建立风力机Kane多体动力学模型，采用异步Matlock模型模拟冰激振动，由Kaimal风速谱、指数风廓线模型和空间相干模型模拟来流风场，结合叶素动力学计算风力机非定常气动载荷，分析湍流风载荷和异步冰激振动模型作用下塔架动力学响应。研究结果表明：异步Matlock模型冰载荷峰值低于同步模型；塔顶前后位移受冰激振动影响较侧向更为显著，幅值和标准差均大幅提高；冰激振动导致塔顶前后位置破碎频率及其靠近叶片2阶挥舞频率倍频处幅值大幅提高，且异步Matlock增幅小于同步模型；异步Matlock模型对塔顶侧向位移影响较小。

Most of the original iceinduced vibration models assume that the surface of the floes is absolutely flat and the whole is in contact with the structure synchronously.The actual surface of the floes has irregularities,so there are differences contact.Therefore,this paper adopts the improved nonsimultaneous Matlock model to study the effect of iceinduced vibration caused by uneven floating ice on the dynamic response of offshore wind turbines.Kaimal wind spectrum,exponential wind profile and spatial coherent model are used to establish a global turbulent wind field,and the aerodynamic load is calculated based on blade element momentum theory.Using Kane method to establish a multibody dynamic model of the whole machine,the ice load and the aerodynamic load are applied to the generalized active force to calculate the dynamic response of each part.The results show that the peak value of the ice load of the nonsimultaneous Matlock model is lower than that of the simultaneous model; the displacement of the front and back of the tower affected by the iceinduced vibration is more significantly than the lateral displacement,the amplitude and standard deviation are both greatly improved; The ice load causes the amplitude of the top and bottom positions of the tower′s breaking frequency and at the frequency multiplier of the secondorder flap wise frequency close to the blade is greatly increased,and the increase of nonsimultaneous Matlock is smaller than that of the simultaneous model; the nonsimultaneous Matlock has little effect on the lateral displacement of the tower top.

TK83

国家自然科学基金（51976131，51676131）；上海市“科技创新行动计划”地方院校能力建设项目（19060502200）