风轮固有频率精度模拟方法研究  

Research on an accuracy simulation method for natural frequency of wind turbine

作　　者：马剑龙[1,2] 吕文春[2] 汪建文[1] 魏海姣[1] 董波[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]内蒙古机电职业技术学院治金与材料工程系,内蒙古呼和浩特010070

出　　处：《可再生能源》2013年第11期76-80,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：针对某风力机风轮固有频率模拟计算,利用SolidWorks软件中"样条曲线"对多数据点同步拟合功能生成了光滑的叶片各翼型面曲线,同时利用SolidWorks软件中"放样"对多数据曲线同步拟合功能实现了叶片整体光滑建模,从而有效解决了模态计算中网络划分时因计算模型非流线性而产生死点或网格畸变的常发性错误,实现了网格的理想划分。利用ANSYS13.0软件模态分析计算模块,配合模型部件材质、部件间接触条件、风轮整体约束条件近实体化设置,使风轮前三阶固有频率计算值与试验值相对误差在5%以内,实现了风轮固有频率的精度模拟。分析产生数据差异的原因主要为实际叶片材质并非各项同性。精度模态计算方法的实现,对风轮结构优化设计及模态计算方面的研究具有较重要的应用价值。In order to calculate the natural frequency of a wind turbine, the SPLINE of SolidWorks was used to generate curve of every airfoil and the LOFT of SolidWorks was used to generate surface of the blade, a recurrent problem of dead point or grid distortion caused by the non-linear flow of the model in the modeling and meshing was solved, then an appropriate mesh is established. The wind wheel natural frequency is simulated accurately. The first three order natural frequencies differences of wind wheel between the calculated data and the experimental data were less than 5% when the condition of the ma- terials of the components, the contact conditions between the components and the constraint of the wind wheel were all set to be close to the solid mode of the wind wheel. The main reason for generating the errors was that the actual material of the blade is not completely isotropic. The implementation of the accuracy-calculation method has more important applied value for the optimization and the modal-theory research of the wind wheel.

关 键 词：风轮 固有频率 精度模拟 方法研究 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]