【作者】 张敏；

【导师】 寇子明；

【作者基本信息】 太原理工大学 ， 机械工程， 2016， 硕士

【摘要】 钢丝绳是由钢丝按照一定的空间螺旋结构捻制而成的挠性制品,具有自重轻、工作平稳、高强度和韧性好等特点。纤维绳芯钢丝绳在矿井提升系统中应用广泛,钢丝绳所受拉伸、弯曲及拉伸引起的扭转力是引起失效的主要原因,其中弯曲与扭转力对性能的影响尤为重要。由于绳芯构造的特殊性,国内外对其研究较少,本文结合纤维绳芯钢丝绳的特性对其受力进行分析研究,这对于研究钢丝绳性能与工况匹配性具有重要的现实意义。本文主要分析6×36WS矿井提升系统用纤维绳芯钢丝绳,借助于Matlab数值分析软件对不同捻向钢丝绳在平直和弯曲状态下二次捻制钢丝的几何特性分析研究,绘制股内不同层钢丝的曲率与挠率随钢丝旋转角的变化趋势,得到了最大、最小值的分布规律,这对研究钢丝绳内部钢丝应力的大小及分布有着重要的意义。对拉伸与扭转模型中钢丝的受力进行了公式推导与计算,通过Pro/E三维软件建立钢丝绳模型,采用耦合约束方法对不同捻向钢丝绳进行模拟加载,并研究股内钢丝的受力分布,得到拉伸载荷下有限元分析结果。通过设计钢丝绳试验平台,利用该平台对钢丝绳进行应变试验分析,验证了钢丝绳模型的正确性。研究比较扭转力下钢丝绳的仿真结果,得到同向捻钢丝绳应力与变形均大于交互捻,不同层之间大小呈现一定规律,最大值均位于最外层钢丝上,股中远离绳芯位置处钢丝变形较大,靠近绳芯处钢丝变形较小。对弯曲状态下钢丝绳中股的缠绕半径、滑轮半径及钢丝绳与滑轮的接触状态进行了分析,对比可得钢丝绳缠绕半径对其弯曲应力影响较大。通过理论计算得到钢丝绳与滑轮的最佳配合模型,在靠近绳芯位置处钢丝弯曲应力较大,股中其他层钢丝弯曲应力呈一定规律排列。在与滑轮接触的拉弯模型中,由于捻制方式的不同导致与滑轮接触处交互捻钢丝绳接触模型应力大于同向捻,同向捻股内其他位置钢丝应力大于交互捻。本文通过对不同捻向圆股钢丝绳施加交变载荷进行研究,得到了不同运行工况下钢丝绳的受力特点及失效原因,为深井提升钢丝绳的选型及与工况特性的匹配提供理论依据和技术支撑,这对于同结构不同直径钢丝绳安全运行具有很好的推广意义。更多还原

【Abstract】 Wire rope is a flexible product, which is made by twisting steel wires according to a certain space helical structure, it has the prominent advantages such as light weight, stable operation, high strength and good toughness. Fiber cable is widely used in mine hoisting system. Tensile, bending and twisting forces induced by stretching of the wire rope are the main causes of failure, and the effect of bending and twisting force on the performance is particularly important. Research on rope core is less because of the particularity of the core structure. The forces combined with fiber rope were analyzed and studied, which has important practical significance for studying the performance of wire rope and the matching of working condition.In this paper, fiber rope 6×36WS of the hoisting system in mine was studied, and by means of numerical analysis software Matlab, the curvature and torsion of double helix of different twist rope in straight and bending state were analyzed. The variation tendency of the curvature and torsion with rotation angle of the steel wire in different wire layers was drawn, and the distributions of the maximum and minimum values were obtained. The calculation formulas for the tension and torsion model were derived and checked. The entity model of wire rope was built by 3D modeling software Pro/E, coupling constraint method was used to simulate the loading of wire rope, and the finite element analytical results of tensile loading were obtained. Wire rope test platform was designed, and it was used to test and verify the correctness of the model of wire rope. Compared with the simulation results under torsion, it is concluded that the stress and deformation of lang lay rope were greater than ordinary lay rope. The stress and deformation of different layers of steel wire were analyzed after being subjected to torque, the maximum value was located on the outermost steel wire, the larger deformation of steel wire was far from the rope core position, and the smaller deformation of steel wire near the core.In the bending state, the winding radius of strands in wire ropes, the radius of pulley and the contact state between wire ropes and the pulley were compared, it is concluded that the winding radius gave more influences on the curvature. The best fit model between wire rope and pulley was obtained by theoretical calculation, it is found that the larger bending stress of wire was closed to the rope core, and the bending stress of the other layers in the strand was arranged in a regular pattern. Because of the different ways of twisting, the stretch bending model of contact between wire rope and pulley was different, and the stress of ordinary lay rope was greater than lang lay rope.The round strand rope of different twist was studied by applying alternating load, and the mechanical characteristics and failure causes of wire rope under different operating conditions were obtained, which provide a theoretical basis and technical support for the selection of wire rope and the matching performance of working condition, it is of good promotion significance for the safety operation of wire ropes with identical structure but different diameter.更多还原