倾覆力耦合的大兆瓦风机主轴-齿轮箱法兰结构疲劳寿命研究
Study on fatigue life of large-megawatt wind turbine's spindle-gearbox flange structure coupled by overturning force
宁可 1王奇 1陈纪光 1王建梅 1宁文钢2
作者信息
- 1. 太原科技大学重型机械教育部工程研究中心,山西太原 030024
- 2. 太原重工股份有限公司技术中心,山西太原 030024
- 折叠
摘要
大兆瓦风机主轴-齿轮箱法兰连接受倾覆力及其他交变载荷的作用,极易产生疲劳破坏.文中建立了考虑倾覆力耦合作用的法兰连接有限元数值模型,分析了特定工况下法兰连接各部件应力场分布规律;通过GH-Bladed获得主轴实际转矩变化数据,根据雨流计数法计算得到了主轴和螺栓多种工况下载荷-时间历程曲线,基于Brown-Miller准则并结合材料的S-N曲线,使用FE-SAFE给出了不同预紧力条件下主轴和螺栓的疲劳寿命,疲劳分析结果表明:随着预紧力的减小,主轴的疲劳寿命大于螺栓的,螺栓在风机运行过程中更容易发生疲劳破坏.基于VDI2230规范,结合法兰界面涂层增摩工艺,得到了法兰界面摩擦因数、螺栓预紧力与法兰结构疲劳寿命的理论模型.该研究对于大兆瓦风机主轴-齿轮箱法兰连接结构设计和疲劳寿命提升具有一定的指导意义.
Abstract
The large-megawatt wind turbine's spindle-gearbox flange connection is susceptible to fatigue damage due to the influence of the overturning force and other alternating loads.In this article,efforts are made to set up the finite-element numeri-cal model of the flange connection,with the coupled overturning force taken into consideration;then,the analysis is conducted on the stress field distribution of the flange connection's each component under specific working conditions.The data on the spin-dle's ever-changing torque is obtained with the help of GH-Bladed;the load-time history curves of the main spindle and the bolt under various working conditions are calculated according to the rain flow counting method;based on the Brown-Miller criterion and in combination with the material S-N curve,FE-SAFE is used to work out the fatigue life of the spindle and the bolt with dif-ferent preloads.The results show that the fatigue life of the spindle is greater than that of the bolt as the preload decreases;the bolt is more prone to fatigue damage when the wind turbine is in operation.According to the VDI2230 specifications,combined with the coating friction-enhancement process applied on the flange interface,the theoretical model is set up for the flange inter-face's friction coefficient,the preload force exerted on the bolt and the flange structure's fatigue life.This study provides guid-ance to develop the large-megawatt wind turbine's spindle-gearbox flange structure and extend its fatigue life.
关键词
风电法兰/有限元模型/疲劳寿命分析/摩擦因数/高强度螺栓Key words
wind power flange/finite-element model/analysis on fatigue life/frictional coefficient/high-strength bolt引用本文复制引用
基金项目
山西省科技重大专项计划(202201060301015)
山西省基础研究计划项目(202203021222206)
太原科技大学研究生联合培养示范基地项目(JD2022021)
出版年
2024
NETL
NSTL
万方数据