风力机风轮低频振动特性的实验模态研究

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振动与冲击 ›› 2013, Vol. 32 ›› Issue (16) : 164-170.

论文

风力机风轮低频振动特性的实验模态研究

马剑龙1,2，汪建文1,2，董波1，张所成1

作者信息 +

Experimental Model Research on Low-frequency Vibration Characteristics of Wind Turbine

MA Jian-long1,2，WANG Jian-wen1,2，DONG Bo1，ZHANG Suo-cheng1

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文章历史 +

摘要

利用国际上先进的PULSE16.1结构振动分析系统，对4个风力机风轮进行模态测试，发现风轮在挂机状态下，低频时存在轴向窜动效应和圆盘效应两种普遍存在的振动方式。振动发生时叶根处分别伴随着往复式和回转式剪切应力，影响到风力机的安全稳定运行和寿命。同时，利用挂机实验对比证明了通常采取的风轮通过夹具安装后在平面上进行模态实验的方法，对风轮振动特性的完整和准确获得均存在一定的影响。初探性分析，轴向窜动效应的产生因主要与塔架的弹性有关；圆盘效应的产生因主要与风轮的安装方式有关。本文相关研究成果有可能为很多风力机叶片在远短于设计寿命期频繁发生疲劳损伤事故的分析提供新的思路和理论支撑。

Abstract

Two widespread vibrations which are axial moving string effect and disc effect of the wind wheel in operating condition were discovered by using the PULSE16.1 system in mode experiments of four wind turbines. There are reciprocating stress and rotary stress respectively at the blade root while the vibration generating，which affect the stable operation and life of the wind turbine. There is a large influence of getting the vibration characteristics of the wind wheel completely and accurately by the conventional experimental method which wind wheel installed through the fixture and tested in the plane compared with the wind wheel tested under hook state. Preliminary analysis，the generation of the axial movement effect is mainly due to the elasticity of the tower and the generation of the disc effect is mainly due to the installation of the wind wheel. The two vibration characteristics may provide some new idea and theoretical support for the analysis of fatigue damage accident of many wind turbine blades in their running time which is much shorter than the design life.

导出引用

马剑龙;汪建文;董波;张所成. 风力机风轮低频振动特性的实验模态研究[J]. 振动与冲击, 2013, 32(16): 164-170

MA Jian-long;WANG Jian-wen;DONG Bo;ZHANG Suo-cheng. Experimental Model Research on Low-frequency Vibration Characteristics of Wind Turbine[J]. Journal of Vibration and Shock, 2013, 32(16): 164-170