To generate more power, wind turbine rotors are growing in size and consequently, wind turbine tower are becoming increasingly taller and more flexible. As a result, fluid–structure interaction (FSI) of the flexible tower caused by strong wind is a very important phenomenon, and tower vibration must be carefully considered. In this paper, the physical model of the wind turbine tower is simplified appropriately, and then a multi-body dynamics model of wind turbine tower system is established based on Transfer Matrix Method of Multibody System (MSTMM). Compared with the data from finite element model (FEM) and field tests, the simulation results show that the model has a good accuracy. By coupling the mode shapes with two degrees of freedom (2-DOF) wake oscillator model, the dynamic responses of the flexible tower are computed. The influence of various foundation stiffness and top mass on tower vibration is studied systematically using this model. The results indicate that different boundary conditions can affect the maximum amplitude and displacement along the axis of the tower. This work provides a reference for dynamic modeling and simulation of high-rise flexible structure, and the prediction of the maximum amplitude of the tower vibration, which can be used for aeroelastic control purpose.

中文翻译：

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传递矩阵法的柔性风力涡轮机塔筒动力学分析

为了产生更多的电力，风力涡轮机转子的尺寸越来越大，因此，风力涡轮机塔架变得越来越高、越来越灵活。因此，强风引起的柔性塔的流固耦合（FSI）是一个非常重要的现象，必须仔细考虑塔的振动。本文对风力机塔架的物理模型进行了适当的简化，然后基于多体系统传递矩阵法（MSTMM）建立了风力机塔架系统的多体动力学模型。与有限元模型（FEM）和现场试验数据对比，仿真结果表明该模型具有良好的精度。通过将振型与两个自由度 (2-DOF) 尾流振荡器模型耦合，计算了柔性塔的动态响应。利用该模型系统地研究了各种基础刚度和顶部质量对塔架振动的影响。结果表明，不同的边界条件会影响沿塔轴的最大振幅和位移。该工作为高层柔性结构的动力学建模与仿真，以及塔筒振动最大振幅的预测提供了参考，可用于气动弹性控制。