风力机风轮结构阻尼比改进方法研究  

Research on improved method of damping ratio about wind wheel

作　　者：马剑龙[1,2] 汪建文[1,2] 董波[1] 魏海姣[1] 

机构地区：[1]内蒙古工业大学能源与动力工程学院,内蒙古呼和浩特010051 [2]内蒙古工业大学风能太阳能利用技术教育部重点实验室,内蒙古呼和浩特010051

出　　处：《可再生能源》2013年第10期65-69,共5页Renewable Energy Resources

基　　金：内蒙古自然科学基金资助项目(2013MS0726);内蒙古自然科学重大基金资助项目(2012ZD08);内蒙古工业大学科学研究基金资助项目(X201218)

摘　　要：针对某风力机风轮结构,提出了翼型加厚、新型双夹板式叶片连接、叶片沿翼展方向开槽和加肋3种结构改进方法,利用B&K公司最新研究的PULSE16.1结构振动分析系统对原翼型风轮和3种结构改进的风轮进行模态测试,获得了风轮结构改进对其阻尼比的影响特性。研究发现,3种结构改进方法均可有效改变风轮阻尼比随振动阶数升高跌宕起伏变化的规律,其中尤其以翼型加厚造成的影响最为显著;翼型加厚对通常关注的1,2阶振动的阻尼比影响相对显著,双夹板式叶片连接方式、叶片沿翼展方向的开槽和加肋两种改进方法则对1,2阶振动的阻尼比影响相对较小,且较均匀。相关研究成果对风轮阻尼比的设计和优化具有较重要的实用价值。The airfoil thickness, the new dual plywood connection of blades, the slotted and threat- ened along the wingspan direction were presented for a wind wheel and the modal tests were done in or- der to get the effect of the structural improvements of the wind wheel on its damping ratio. The study found that the three structural improvement methods could all improve the change regulation of the damping ratio effectively with the vibration order increasing, and the most significant effect was the air- foil thickness. The airfoil thickness influenced the damping ratios of the first-order vibration and the second-order vibration to be more significant than other-order vibrations. The other two structural changes influenced the damping ratios of the first-order vibration and the second-order vibration to be relatively small and uniform. The related results have more important practical value for the design and the optimization of the damping ratio about the wind wheel.

关 键 词：风力机 风轮 阻尼比 改进方法 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]