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Dynamic modeling of vortex induced vibration wind turbines

机译：涡激振动风力发电机的动态建模

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This paper studies the dynamic modeling of four configurations of vortex-induced vibrations of a bladeless wind turbine (BWT). The BWTs consist of a bluff body mounted on a flexible structure in the flow field. The shape of the bluff body and its mounting structure are different among the proposed BWTs. The Euler-Bernoulli beam theory and the Galerkin procedure are used to derive a nonlinear distributed -parameter model for the BWTs under a fluctuating lift force due to periodically shedding vortices. The derived dynamic model is validated through comparison with a 3D CFD-FEM numerical simulation. The effects of the wind speed on the induced lift force, turbine deflection, and generated power of four BWTs are investigated. It is verified that the amplitude of the vibrations of the BWT increases significantly when the vortex shedding is synchronized with the structural oscillations. The results show that, while conic BWTs have a higher performance at post-synchronization region (i.e. high wind speeds), the right circular cylinder BWTs exhibits a better performance at pre-synchronization region (i.e. low wind speeds). (C) 2018 Elsevier Ltd. All rights reserved.
机译：本文研究了无叶片风力涡轮机（BWT）的四种涡流振动的动力学模型。 BWT由安装在流场中柔性结构上的钝体组成。所提出的BWT之间，钝体的形状及其安装结构不同。利用Euler-Bernoulli束理论和Galerkin程序推导了在周期性波动涡流引起的起升力波动下，BWT的非线性分布参数模型。通过与3D CFD-FEM数值模拟进行比较来验证导出的动态模型。研究了风速对四个BWT的感应升力，涡轮偏转和发电功率的影响。可以证明，当涡旋脱落与结构振动同步时，BWT的振动幅度会显着增加。结果表明，虽然锥形BWT在后同步区域具有较高的性能（即高风速），但右圆柱BWT在同步前区域具有较高的性能（即低风速）。 （C）2018 Elsevier Ltd.保留所有权利。

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