起重运输机械Issue(13)：84-90,7.
基于多轴疲劳理论的冶金起重机主梁母材疲劳失效机理研究
摘要
Abstract
The fatigue failure of metal structural parts of metallurgical cranes is the main failure mode,which often occurs at places with poor fatigue performance,maximum stress or stress concentration.In previous researches on fatigue,only vertical and horizontal loads were considered,and the theoretical design fatigue strength margin was large.Due to the complicated working conditions,the main girder of metallurgical crane base metal will crack after being used for a certain number of years,and factors such as high temperature,vertical load,horizontal impact load,track height difference of cart,and wire rope hanging load shaking will lead to tensile-torsional multiaxial fatigue load.Therefore,in this paper,based on the actual working conditions,the multi-axial high-cycle fatigue tests with different loading parameters were carried out in the laboratory,taking the common main girder box steel structure Q345B as the research object to study the multi-axial high-cycle fatigue failure mechanism of metallurgical cranes.关键词
冶金起重机/多轴疲劳/疲劳寿命预测/S-N曲线Key words
metallurgical crane/multi-axial fatigue/fatigue life prediction/S-N curve分类
机械工程引用本文复制引用
李飞,李向东,刘浩,曹夏..基于多轴疲劳理论的冶金起重机主梁母材疲劳失效机理研究[J].起重运输机械,2024,(13):84-90,7.基金项目
江苏省特种设备安全监督检验研究院科技计划项目(KJ(Y)2023027) （KJ(Y）
