大型风力机叶片净空计算方法研究  

Study on Clearance Calculation Method of Large Wind Turbine Blades

作　　者：董笑宇 曲春明 葛文澎 夏冰 苗得胜 DONG Xiaoyu;QU Chunming;GE Wenpeng;XIA Bing;MIAO Desheng(Mingyang Smart Energy Group Co.,Ltd.)

机构地区：[1]明阳智慧能源集团股份公司

出　　处：《上海节能》2024年第2期342-349,共8页Shanghai Energy Saving

摘　　要：风力机容量增长伴随着叶片尺寸和柔性不断增大,易引起叶片扫塔。以108m长叶片为研究对象,对比了叶片气动载荷和结构响应多种计算方法,研究了叶片净空距离的影响因素。基于叶素动量理论BEM和计算流体力学CFD计算叶片载荷,同时采用多体动力学MED和梁有限元两种方法计算叶片的受载变形。结果表明,采用叶素动量理论BEM计算的叶片中段载荷比采用计算流体力学CFD值更大,且载荷整体分布更均匀,多体动力学MED比1D梁单元法模态分析结果更准确,但两者计算的叶片变形程度相当。叶片变形与载荷呈单调递增正比关系,随刚度增加呈减小趋势,因此,工程使用BEM方法结合多体动力学方法可用于大型叶片净空计算,计算值相对保守。The growth of wind turbine capacity is accompanied by the continuous increase in blade size and flexibility,which is prone to cause blade sweeping.Taking a 108-meter long blade as the research object,various computational methods for calculating the aerodynamic load and structural response of the blade were compared,and the influencing factors of the blade clearance distance were studied.Based on the BEM theory of leaf element momentum and CFD calculation of blade load,the load defor-mation of the blade was calculated using both multi-body dynamics(MED)and beam finite element methods.The results showed that the load on the middle section of the blade calculated using BEM was larger than that calculated using CFD,and the overall distribution of load was more uniform.The MED method was more accurate than the 1D beam element method modal analysis result,but the de-formation degree of the blade calculated by both methods was comparable.The relationship between blade deformation and load was monotonically increasing and proportional,with a decreasing trend as stiffness increased.Therefore,the BEM method'combined with multi-body dynamics method can be used for large-scale blade clearance calculation in engineering,and the calculated value is relatively conservative.

关 键 词：叶片净空 气动载荷 结构响应 刚度 

分 类 号：TM315[电气工程—电机]