海上风力机单叶片吊装对接TMD被动抑振研究

    A Study on Passive Vibration Suppression of TMD for Single Blade Hoisting and Docking in Offshore Wind Turbines

    • 摘要: 随着风力机大型化,叶片尺寸和柔性显著增加,吊装过程中叶片受风载荷作用导致气弹耦合振动,影响对接定位精度和安装效率。本文首先建立了海上单叶片吊装的气弹耦合动力学模型,并基于叶片吊装结构、受载以及叶片振动运动特点,辨识叶片振动运动的主要方向,解耦叶片运动形式,建立吊装结构简化动力学模型;而后基于吊装叶片主运动的特点,在叶片夹具上分别设置单调谐质量阻尼器(Single Tuned Mass Damper,STMD) 和多重调谐质量阻尼器系统(Multiple tuned mass damper system,MTMDs) 抑制吊装叶片振动,并由吊装叶片简化动力学模型,以对接点振动运动位移最小,优化设计调谐质量阻尼器(Tuned Mass Damper,TMD) 抑振参数。为验证上述方法可行性,在随机湍流风况下,分析不同湍流强度和入流角条件下TMD对吊装叶片振动抑制效果。结果表明,TMD在随机风况下能有效降低叶片对接位置的运动幅度,提升吊装对接的精度和效率,并据此提出更具工程适应性的TMD减振方案。

       

      Abstract: As wind turbines become larger, the blade size and flexibility increase significantly. During the hoisting process, the blades are subjected to wind loads, leading to aeroelastic coupled vibrations that affect docking precision and installation efficiency. In this research, an aeroelastic coupled dynamic model for the hoisting of a single offshore wind turbine blade is firstly established. Based on the characteristics of the blade hoisting structure, loading, and blade vibratory motion, the main directions of blade vibration are identified. The motion modes of the blade are decoupled, and a simplified dynamic model of the hoisting structure is developed. Subsequently, based on the primary motion characteristics of the hoisted blade, a Single Tuned Mass Damper (Single Tuned Mass Damper, STMD) and Multiple Tuned Mass Damper system (Multiple tuned mass damper system, MTMDs) ) are respectively installed on the blade clamps to suppress the blade vibrations. By using the simplified dynamic model of the hoisted blade, the tuned mass damper (Tuned Mass Damper, TMD) parameters are optimized to minimize the vibratory displacement at the docking point. To verify the feasibility of the proposed method, the vibration suppression effect of the TMD is analyzed under random turbulent wind conditions, considering different turbulence intensities and inflow angles. The results show that TMDs effectively reduce the motion amplitude at the blade docking position under random wind conditions, improving the accuracy and efficiency of the hoisting and docking process. Based on these results, a more engineering-adaptable TMD vibration reduction scheme is proposed.

       

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