特种设备钢丝绳的应力和疲劳寿命仿真分析

摘要

为分析钢丝绳在提升工作过程中绳上的应力分布和疲劳失效情况,以某型特种设备用6×36 WS钢丝绳为研究对象,对钢丝绳在轴向拉伸和绕滑轮弯曲状态下的应力和疲劳寿命进行了仿真研究.建立钢丝绳的有限元模型,仿真分析了其在轴向拉伸和绕滑轮弯曲状态下的应力分布情况;进行钢丝的疲劳试验,得到了钢丝疲劳寿命数据;根据钢丝疲劳数据和钢丝绳有限元分析结果,依据Miner线性累积损伤理论进行了钢丝绳的疲劳寿命仿真分析.结果表明:钢丝绳在相邻钢丝接触区域、相邻绳股接触区域以及钢丝绳与滑轮接触区域应力较大,应力越大的部位,最先发生疲劳失效,疲劳寿命越小.%The stress and fatigue life of 6 × 36 WS wire rope of a special equipment under axial tension and the bending state around the pulley are studied to analyze the stress distribution and fatigue failure of steel wire rope during the working process.A finite element model of the steel wire rope is established,and the stress distribution under the axial tension and the bending state around the pulley are simulated and analyzed.Then the fatigue test of the steel wire is carried out to obtain the fatigue life data.Based on the fatigue data of the steel wire and the finite element analysis results of the rope,the fatigue life simulation analysis of the wire rope is carried out according to Miner linear accumulated damage theory.The results show that the stress of steel wire rope is larger in the contact areas of the adjacent wires and rope strands,and the contact area between wire rope and pulley.The greater the stress is,the shorter the fatigue life is.