CrMo风机塔筒法兰高强度螺栓疲劳寿命分析.PDFVIP

下半月出版 Material Heat Treatment 材料热处理技术 42CrMo 风机塔筒法兰高强度螺栓疲劳寿命分析 何玉林, 侯海波, 杜静, 李成武, 吴德俊 (重庆大学 机械传动国家重点实验室, 重庆 400030) 摘 要 基于Schmidt-Neuper 理论 针对风机塔筒法兰高强度合金钢螺栓 建立了将法兰中心载荷时间历程转换为 螺栓应力时间历程的公式化方法遥并依据德国劳埃德船级社规范 对螺栓S-N 曲线进行了修正遥通过雨流计数法得到应 力时间历程的完整循环载荷 再运用Palmgren/Miner 线性累积损伤理论得到螺栓的疲劳损伤遥同时 还通过有限元法拟 合了法兰中心载荷与螺栓应力的公式 并计算了螺栓疲劳损伤遥通过将这两种方法得到的结果进行对比 证明了所研究 方法的有效性 为 力发电机螺栓的设计提供了参考遥 关键词 风力发电机曰高强度螺栓曰应力时间历程曰疲劳损伤曰S-N 曲线 中图分类号 TK83 文献标识码 A 文章编号 Fatigue Life Analysis on 42CrMo High-strength Flange-bolt Used in Wind Turbine Tower Simulator HE Yulin, HOU Haibo, DU Jin, LI Chengwu, WU Dejun (State Key Laboratory of Mechanical Trans miss ion, Chongqing Univ ers ity, Chongq ing 400030, China) Abstract 院Based on the schmidt-neuper theory, the formulaic method for converting the load time series into the stress time series was set up, which can be used in high-strength alloy steel bolts of wind turbine tower flange. According to the guideline for the certification of wind turbines compiled by Germanischer lloyd, the S-N curves of the bolts were modified. Rain flow counting method was used to get the complete load cycle of stress time series, and the fatigue damage of the bolts was calculated by using the Palmgren/Miner method. Besides, the formula of the centric load of flange and the bolt stress were also obtained by finite element method, and the fatigue damage of the bolts was calculated. By comparing the results of the two methods, the validity of the method described in the research