摘要
考虑叶片、塔筒连接螺栓等细部结构建立大型风电机组精细化模型,验证现有研究成果中机组各部件简化方案在模态分析中的适用性。数值分析结果表明,机舱刚度、偏心及转动惯量对机组自振频率影响较小,模态分析中可简化为质量点;大型风机叶片主梁、抗剪腹板及蒙皮结构对结构自振频率均有明显影响,模态分析中需加以考虑;塔筒连接螺栓对结构自振频率影响较小,模态分析中可作简化处理;连接法兰对机组1阶、2阶模态自振频率影响较为明显,分析中不应忽略。
Considering the detailed structures of blades,tower connecting bolts and others,a refined model of large-scale wind turbine is established to verify the applicability of the simplified modeling method for each component of wind turbine in the existing research results in modal analysis.The results of numerical analysis show that,(a)the stiffness,eccentricity and moment of inertia of the nacelle have little influence on the natural frequencies of wind turbine,so the nacelle can be simplified to mass points in modal analysis;(b)the beam,shearing webs and pavement of the blades have obvious influence on the natural frequencies of the structure,which need to be considered in modal analysis;(c)the tower connecting bolts have little influence on the natural frequencies of the structure,which can be simplified;and(d)the connection flange has obvious influence on the first and second-order natural frequencies of wind turbine,which should not be ignored in modal analysis.
作者
周茂强
王振扬
沈晓雷
苏凯
ZHOU Maoqiang;WANG Zhenyang;SHEN Xiaolei;SU Kai(Zhejiang Huadong Engineering Consulting Co.,Ltd.,Hangzhou 310014,Zhejiang,China;State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan 430072,Hubei,China;Key Laboratory of Rock Mechanics in Hydraulic Structural Engineering(Ministry of Education),Wuhan University,Wuhan 430072,Hubei,China;Hubei Provincial Key Laboratory of Water System Science for Sponge City Construction,Wuhan University,Wuhan 430072,Hubei,China)
出处
《水力发电》
CAS
2022年第8期101-104,110,共5页
Water Power
关键词
海上风电
模态分析
简化建模
机舱模拟
叶片建模
塔筒连接
适用性研究
offshore wind power
modal analysis
simplified modeling
nacelle simulation
blade modeling
tower connection
applicability research
