| 大型风力机复合材料叶片动态特性及气弹稳定性分析 |
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| 引用本文： | 刘伟,尹家聪,陈璞,苏先樾.大型风力机复合材料叶片动态特性及气弹稳定性分析[J].空气动力学学报,2011,29(3). |
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| 作者姓名： | 刘伟 尹家聪 陈璞 苏先樾 |
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| 作者单位： | 北京大学力学与空天技术系湍流与复杂系统国家重点实验室,北京,100871 |
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| 基金项目： | 国家重点基础研究发展计划项目(2007CB714603) |
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| 摘 要： | 采用参数化建模技术快速建立大型风力机复合材料叶片三维有限元壳模型,并在此基础上对叶片的固有动力学特性进行停机及以额定转速旋转两种工况下的模态分析,其中旋转工况考虑了离心力导致的应力刚化效应和旋转软化效应。通过编制插值程序,将CFD计算所得的叶片表面分布压力,导算到叶片结构计算的有限元壳模型上,并以此为载荷对叶片进行静气弹稳定性分析。以某初步设计的1.5MW风机为例的计算结果表明:在参数化三维壳模型建模基础上进行的模态分析技术与结合CFD的静气弹稳定性分析技术,有利于快速、准确地计算大型复合材料叶片的动态特性、识别叶片结构的薄弱部位,并预测叶片发生局部屈曲的可能性及其发生的位置。
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| 关 键 词： | 风机叶片 壳模型 模态分析 气弹稳定性 屈曲分析 |
Dynamic analysis and aeroelastic stability analysis of large composite wind turbine blades |
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| LIU Wei,YIN Jia-cong,CHEN Pu,SU Xian-yue.Dynamic analysis and aeroelastic stability analysis of large composite wind turbine blades[J].Acta Aerodynamica Sinica,2011,29(3). |
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| Authors: | LIU Wei YIN Jia-cong CHEN Pu SU Xian-yue |
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| Institution: | LIU Wei,YIN Jia-cong,CHEN Pu,SU Xian-yue(Dept of Mechanics and Aerospace Engineering & State Key Lab for Turbulence and Complex System,Peking University,Beijing 100871,China) |
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| Abstract: | Parametric modeling technique is developed to fast build the three-dimensional finite element shell model of a preliminarily designed large composite wind turbine blade,which is subsequently used in the dynamic analysis and static elastic aeroelastic stability analysis of the blade.In the dynamic analysis,natural frequencies and corresponding modal shapes are obtained for the blade in the case of being still as well as being rotating with rated revolution.For the rotating blade,the stress stiffening effect ... |
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| Keywords: | wind turbine blade three-dimensional shell model dynamic characteristic static aeroelastic stability buckling analysis |
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