钢丝绳应力场与疲劳寿命研究

The Research of Stress Field and Fatigue Life of the 6×7+IWS Steel Wire Ropes

钢丝绳以独特的螺旋结构广泛应用于起重装备中,其应力与疲劳寿命特性是评价钢丝绳工作性能的重要指标。基于SolidWorks-ANSYS平台,运用空间扭曲特征建立一个完整捻距钢丝绳模型,结合虚拟疲劳寿命分析方法,对不同钢丝捻矩6×7+IWS型钢丝绳进行应力与疲劳寿命有限元分析。通过分析发现,6×7+IWS型钢丝绳芯股主要承担着轴向载荷的作用,钢丝捻距的大小影响着钢丝绳的应力分布特性,同时应力大小决定着钢丝绳的疲劳寿命,应力越大疲劳寿命越小。研究结果表明,选取合适的钢丝捻距值,直径、侧股捻距的6×7+IWS型钢丝绳采用钢丝捻距,能有效改善钢丝绳应力分布和提高疲劳寿命,更好的满足工作要求。

The steel wire ropes are widely used in the lifting equipment by the unique spiral structure, and the stress and fatigue life characteristics are grate indices of pet.formance evaluation on the steel wire ropes. Based on SolidWorks ANSYS platform, it used a new type of spatial method of distorting modeling and virtual fatigue life to conduct a finite element analysis of the stress and fatigue life of different lay lengths steel wire ropes of 6×7＋IWS. Through the analysis found that the core of this type of steel wire ropes mainly share the axial loads, the wire lay length affects the characteristic of stress distribution of the steel wire rope, meanwhile the stress determines the fatigue life of the steel wire rope, the larger the stress, the less of the fatigue life. The research shows that selecting the appropriate wire lay length, the diameter of and the outer femoral lay length of 6 ×7 ＋IWS wire rope which using the wire lay length can effectively improve the wire rope stress distribution and the fatigue life, and to better meet the job requirements