原创-EI期刊-特种设备钢丝绳的应力和疲劳寿命.docxVIP

特种设备钢丝绳的应力和疲劳寿命仿真分析 摘要：为分析提升钢丝绳在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。首先建立了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。然后进行了钢丝的疲劳试验，得到了钢丝的疲劳寿命数据。最后根据钢丝的疲劳数据和钢丝绳的有限元分析结果，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和相邻绳股接触区域，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。 关键词：固体力学；钢丝绳；有限元；应力；Miner法则；疲劳寿命 中图分类号：TD532 文献标识码：A Simulation analysis on the stress and fatigue life of a special equipment’s rope Abstract: In order to analyze the stress distribution and fatigue failure of the steel wire rope during the working process, the 6×36 WS wire rope of a certain special equipment was studied for the stress and fatigue life under axial tension and the bending state around the pulley. First, the finite element model of the steel wire rope was established, and the stress distribution under the axial tension and the bending state around the pulley was simulated and analyzed. Then the fatigue test of the steel wire was carried out to obtain the fatigue life data. Finally, based on the fatigue data of the wire and the finite element analysis results of the rope, the fatigue life simulation analysis of the wire rope was carried out according to Miner linear accumulated damage theory. The results show that the stress of the steel wire rope is larger in the contact area of the adjacent wires, ropes and the contact area between the wire rope and the pulley. The greater the stress is, the shorter the fatigue life is. Key words: solid mechanics; steel wire rope; FEM; stress; Miner theory; fatigue life 0 引言 钢丝绳是由多根钢丝按照一定的规律捻制而成的[1]，具有挠性好，强度高和自重轻等特点，广泛应用于矿井和起重机械提升机构中，在国民生产和军工领域中发挥着重要作用[2]。提升机构的钢丝绳在卷筒和滑轮组构成的卷绕系统中运行时会反复受到拉伸和弯曲载荷的作用。由于钢丝绳中各根钢丝呈空间螺旋结构，且存在大量接触，钢丝绳的应力分布较为复杂。同时在正常工作情况下，疲劳断裂是钢丝绳的主要失效形式之一[3]。在航天、采矿和冶金等对提升机构安全性具有较高要求的行业中，钢丝绳等重要承载零部件的疲劳失效一直是受到重点关注的问题。 针对钢丝绳的应力分布和疲劳失效问题，许多学者进行了研究。陈向阳[4]建立了1×7+IWS钢丝绳的有限元模型，分析了摩擦系数对钢丝绳应力和应变分布的影响。杜文正[5]在相同的轴向载荷下,利用ABAQUS和FE-SAFE软件仿真分析了摩擦因数对钢丝绳应力分布和疲劳寿命的影响。张敏[6]基于ABAQUS研究了不同扭矩下钢丝绳的应力分布规律。马军[7]在忽略钢丝的挤压收