摘要
根据德国劳埃德风电机组认证规范,基于动量-叶素理论在BLADE软件中提取直驱风电机组在各个工况下的极限载荷,采用非线性有限元方法,联合HYPERMESH和Ansys软件对机舱进行极限强度分析.结合直驱风电机组的工作原理,对偏航制动器及偏航驱动电机作用在机舱上的载荷进行分配,提出可以有效模拟机舱真实受载的方法,且基于分析结果对机舱结构进行优化.优化后的模型分析结果显示极限强度满足要求,安全系数为1.5,且质量减轻7.46%.模态分析结果显示机舱固有频率避开了叶轮转动的1P和3P频率,不会出现共振现象.
According to GL Guideline for the Certification of Wind Turbines,extracted the ultimate load of direct-drive wind turbine in the BLADE software.Based on the nonlinear finite element method,the ultimate strength was performed by using HYPERMESH and Ansys software.Analyzed the operating principle of direct-drive wind turbine,distributed the load for the effect of yaw brakes and yaw drives on nacelle,provided a load applying method to simulate the actual stress of nacelle effectively,and optimized the nacelle structure based on the analysis results.Analysis results of the optimized model indicated that the nacelle had sufficient ultimate strength,the safety factor was 1.5.Mode analysis results revealed the natural frequency of the nacelle evaded the driving frequency of the wind wheel,and the resonance phenomenon did not occur.
作者
李洪滨
王义进
陈朝富
张水龙
LI Hongbin;WANG Yijin;CHEN Chaofu;ZHANG Shuilong(Research and Development Department,Xinda Heavy Industry Co.,Ltd.,Ningbo 315113,Zhejiang,China)
出处
《中国工程机械学报》
北大核心
2019年第4期371-376,共6页
Chinese Journal of Construction Machinery
关键词
直驱风机
机舱
载荷分配
极限强度
模态分析
direct-drive wind turbine
nacelle
load distribution
ultimate strength
mode analysis
