在重载长行程工况下，多层股钢丝绳因复杂的空间结构而具有良好的性能，但也增加了对其受力与磨损分析的难度。为探究多层股钢丝绳的受力情况，本文先基于Frenet标架建立了12×37 WS多层股钢丝绳在直线与弯曲状态的数学模型，并根据钢丝绳参数计算了其受到6吨拉力时不同层股间钢丝的接触应力与弯曲应力。再分别以内层股、中层股与外层股的捻距为变量，探究其对钢丝接触应力的影响规律，为多层股钢丝绳结构参数的优化提供了指导。之后通过SolidWorks建立钢丝绳有限元模型，并用workbench软件的仿真对其力学性能进行了验证。最后综合理论计算与有限元分析的结果，得出多层股钢丝绳受恒张力作用时，绳股的最外层钢丝更易因磨损而发生断丝失效，并且越靠近芯股的层股应力越大的结论，提出了可以通过适当增大芯股直径，减小外层股直径来降低钢丝绳断丝几率的方法。

Under heavy-duty and long-stroke conditions, multi-strand wire rope has good performance because of its complex spatial structure, but it is also difficult to analyze its force and wear. In this paper, based on Frenet standard frame, the mathematical model of 12× 37 WS multi-strand steel wire rope in straight line and bending state is established, and the contact stress and bending stress between different strands are calculated according to the parameters of the steel wire rope when it is subjected to 6 tons of tension. Next, the lay distance of the inner strand, the middle strand and the outer strand is taken as the variable, and its influence on the contact stress of the steel wire is studied, which provides a guide for the optimization of the structural parameters of the multi-strand steel wire rope. Then the finite element model of steel wire rope was established by SolidWorks, and its mechanical properties were verified by workbench software simulation. Finally, based on the results of theoretical calculation and finite element analysis, it is concluded that the outermost steel wire of the rope strand is more likely to break due to wear when the rope is subjected to constant tension, and the more close to the core strand, the greater the stress of the layer strand, and the method can be put forward to appropriately increase the diameter of the core strand and reduce the diameter of the outer strand to reduce the breakage rate of the wire rope.