钢丝绳应力分析与疲劳寿命研究

摘要

The finite element method and fatigue analysis software were used to explore the stress distribution and fatigue life of the wire rope in lifting weights.A 3D solid model of the 6×6+WS structure of stone cross strand wire rope for a certain lifting equipment was built with SolidWorks 2014.After that,the model was imported into the ABAQUS6.14-1/ACE.The finite model of the wire rope was established and analyzed to obtain the stress distribution under the 0.2% deformation in the axial direction.Finally,combined with FE-SAFE,the fatigue analysis of the steel wire rope is carried out to obtain the fatigue life distribution.The results show that the stress of the steel wire rope presents a space spiral distribution and the maximum Von-Mises stress is located on the core wire of the wire strand whose fatigue life is the least.Steel wire rope manufacturers should take measures to improve the strength of core steel wire.If the performance of core wire can be improved,the life of wire rope will be greatly improved as well.%为研究钢丝绳在提升重物时的应力分布规律及其在此工况下的疲劳寿命.首先在SolidWorks中建立了某种起重机所采用的6×36+WS结构右交互捻圆股钢丝绳的三维实体模型,然后将其导入ABAQUS中,建立有限元模型,进行有限元分析,得到钢丝绳在千分之二轴向变形时的应力分布规律.最后联合FE-SAFE对钢丝绳进行疲劳分析,得出其疲劳分布情况.结果表明:钢丝绳应力呈空间螺旋状分布,股芯钢丝与内侧钢丝接触处Von-Mises等效应力最大,且此处疲劳寿命值最小,若能提高股芯钢丝性能,将显著提高钢丝绳寿命.