风力发电高塔系统阵风荷载因子法

贺广零

振动与冲击 ›› 2010, Vol. 29 ›› Issue (2) : 175-178.

PDF(493 KB)
PDF(493 KB)
振动与冲击 ›› 2010, Vol. 29 ›› Issue (2) : 175-178.
论文

风力发电高塔系统阵风荷载因子法

  • 贺广零
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Gust Loading Factor Method for Wind Turbine System

  • He Guang-ling
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摘要

给出了风力发电高塔系统阵风荷载因子法。与传统的阵风荷载因子法不同的是,因桨叶/塔体相互作用的存在,风力发电高塔系统阵风荷载因子包含两项共振分量。一般地,风力发电高塔系统包含桨叶和塔体两个子结构,每个子结构都可视为单自由度体系,二者耦合在一块构成两自由度体系。因桨叶和塔体自振频率可能相近,系统响应的共振分量包含了桨叶/塔体耦合系统前两阶振型的贡献。为获得风力发电高塔系统阵风荷载因子的准确值,本文给出了塔顶位移和基底弯矩阵风荷载因子数值解以及塔顶位移阵风荷载因子精确解。同时,针对桨叶不同转速给出了一系列考虑桨叶/塔体耦合的两自由度体系阵风荷载因子,并与不考虑桨叶/塔体耦合的单自由度体系阵风荷载因子比较,两者有一定的区别。

Abstract

This paper proposes a method based on the gust loading factor (GLF) for evaluating the along-wind response of wind turbine system. The approach presented differs from conventional GLF methods as the GLF contains contributions from two resonant modes, mainly due to blade/tower interaction effects. The wind turbine system model considered contains two interconnected flexible subsystems, representing the tower and the rotor system. Each component is initially modeled as a separate degree-of-freedom (DOF), and these are coupled together to form a two DOF reduced order model of the coupled blade/ tower system. Thus, the resonant component of the response contains energy output from the two modes of the coupled system. The GLF is obtained for both tower tip displacement and base bending moment through numerical integration, with a closed form expression included for the former. A series of numerical examples are included to investigate the magnitude of GLFs obtained for the two DOF assembly which allows for blade/tower interaction, and these are compared with GLF values obtained from an equivalent single DOF model which ignores blade/tower interaction by lumping the mass of the blades in with that of the nacelle.

关键词

风力发电高塔系统 / 阵风荷载因子法 / 桨叶/塔体耦合 / 塔顶位移 / 基底弯矩

Key words

Wind turbine system / Gust loading factor method / Blade/Tower interaction / Tower tip displacement / Base bending moment

引用本文

导出引用
贺广零. 风力发电高塔系统阵风荷载因子法[J]. 振动与冲击, 2010, 29(2): 175-178
He Guang-ling . Gust Loading Factor Method for Wind Turbine System [J]. Journal of Vibration and Shock, 2010, 29(2): 175-178

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