作　　者： (蒋祥增）; (高志鹰）; (汪建文）; (白叶飞）; (闫萌萌）; (王枭）; (侯熠）;

机构地区： 内蒙古工业大学能源与动力工程学院,内蒙古呼和浩特010051

出　　处： 《排灌机械工程学报》 2017年第8期685-691,共7页

摘　　要： 为了通过测塔架上的振动信号来推演风轮应变分布规律,利用Pulse 20.0振动分析系统和旋转遥测应力应变测试系统,对运行工况下的风轮应变与塔架振动进行同步测试,研究二者之间的关联性.通过谱分析法发现风轮上的应变频谱的峰值频率和塔架上的振动频谱的峰值频率能够很好地对应,且频率为旋转基频处对应的风轮应变存在一定的分布规律:在翼展方向,从叶根往叶尖的0°(翼展)方向应变先减小后微弱增大,最后逐渐减小;45°方向应变先基本不变,在靠近叶尖的0.87R处应变值大幅度减小;90°(弦长)方向整体应变值呈逐渐减小趋势.风轮叶根处从前缘往后缘方向,0°(翼展)方向和45°方向的应变值先增大后减小;90°(弦长)方向从前缘往后缘方向应变值均逐渐减小.研究为工程应用中风轮实时载荷的监测与诊断提供了一种新思路,具有重要的现实意义. By using Pulse 20. 0 analysis vibration system and the rotary remote stress strain test system,a synchronous test for the wind turbine strain and tower vibration under the operating condition was given to study the correlation between them. The spectrum analysis found that the peak frequency of strain spectrum on the wind turbine and the peak frequency of vibration spectrum on the tower can correspond well,and the distribution law of certain rotation frequency round of the wind turbine strain is the strain spanwise from root to tip,the strain at 0°（ spanwise） decreases first,then increases and finally decreases slightly. The strain at 45° direction is unchanged,the strain value greatly reduces at0. 87 R near the tip. The overall strain values at 90°（ chord direction） decrease gradually. At the windturbine blade root from the front back edge direction,the strain values at 0°（ spanwise） and 45° increase first,then decrease,the strain value at 90° chord direction gradually decreases from the front back edge direction. The research provides a new idea for the monitoring and diagnosis of the real-time load of the wind turbine.

关 键 词： 风轮 塔架 应变 振动 峰值频率