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首页> 外文会议>ASME Wind Energy Symposium >TIME DOMAIN STRUCTURAL RESPONSE CALCULATIONS FOR VERTICAL AXIS WIND TURBINES
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TIME DOMAIN STRUCTURAL RESPONSE CALCULATIONS FOR VERTICAL AXIS WIND TURBINES

机译：垂直轴风力涡轮机的时域结构响应计算

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摘要

Structural response of Vertical Axis Wind Turbines (VAWTs) during transient events such as starting and stopping or during variable speed operation cannot be estimated with existing frequency domain techniques. Time domain simulation is presented, including the effects of changes in rotation speed on turbine response. The method for predicting the structural response of VAWTs during variable speed events differs from that used to analyze constant speed operation in two ways: (1) the equations of motion no longer have constant coefficients and (2) additional terms contribute to the stiffness matrix and loading vector. The structural matrices are obtained at several discrete rotor speeds using NASTRAN and interpolated for intermediate speeds. The equations of motion are then numerically integrated in a separate program. Results for constant speed operation in turbulence-free winds agree favorably with those from a frequency domain analysis. Reasonable results are obtained for a change in rotor speed which passes through a structural resonance.
机译：通过现有的频域技术，不能估计瞬态事件期间垂直轴风力涡轮机（VAWTS）的结构响应，例如启动和停止或在可变速度操作期间。提出了时域仿真，包括在涡轮响应上旋转速度变化的影响。在可变速度事件期间预测VAWTS的结构响应的方法不同于以两种方式分析恒定速度操作：（1）运动方程不再具有恒定系数，并且（2）附加术语有助于刚度矩阵和刚度矩阵装载矢量。使用Nastran以几个离散转子速度获得结构矩阵，并插入中间速度。然后在单独的程序中以数字集成运动方程。湍流风中的恒定速度运行的结果有利地与来自频域分析的恒定相似。获得合理的结果，用于转子速度的变化，其通过结构共振。

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