轴向载荷下WR-CVT异股钢绳环数值模拟  

Numerical simulation of WR-CVT wire ropes with different strands under axial load

作　　者：吕常磊 张武[1] 刘卫雄 常浩文 赵书阳 LYU Changlei;ZHANG Wu;LIU Weixiong;CHANG Haowen;ZHAO Shuyang(College of Mechanical and Engineering,Xi'an University of Science and Technology,Xi'an 710054)

机构地区：[1]西安科技大学机械工程学院,陕西西安710054

出　　处：《机械设计》2023年第7期25-32,共8页Journal of Machine Design

基　　金：西安市科技计划项目(2019217714GXRC0,13CG014-GXYD13.7)。

摘　　要：为分析弯曲状异股钢丝绳应用在WR-CVT (Wire Rope-Continuously Variable Transmission)工况下的力学分布特点,文中推导建立了弯曲状椭圆股数学模型,并与传统圆股6×7+IWS钢丝绳和三角股绳进行轴向载荷下的数值模拟对比。结果表明:相同载荷下,弯曲状椭圆股钢丝绳、中心丝及侧丝较三角股和6×7+IWS的应变分布更加均匀,右侧外层丝应力大于左侧的,横截面应力幅均值小,伸长量小,具有更佳的耐磨性和抗疲劳特性;弯曲状三角股钢丝绳截面应力幅均值和伸长量较大,更易达到应力屈服;而6×7+IWS钢丝绳的各种力学特性均介于椭圆股和三角股之间。In this article,in order to explore the mechanical distribution characteristics of the curved wire ropes with different strands in the WR-CVT(Wire Rope-Continuously Variable Transmission) working condition,efforts are made to derive and set up the mathematical model of the curved elliptic-strand wire rope;then,it is subject to numerical simulation.The comparative analysis is conducted on the curved elliptic-strand wire rope,the traditional circular wire rope 6×7+IWS,and the curved triangular-strand wire rope under the axial load.The results are as follows.Under the same load,compared with the curved triangular-strand wire rope and the traditional circular wire rope 6×7+IWS,the curved elliptic-strand wire rope has more uniform stress distribution on its center wire and side wire;the stress on the outer wire on the right side is greater than that on the left side;the average cross-sectional stress amplitude is small,and the elongation is small,with better wear and fatigue-resistance characteristics.The average stress amplitude and elongation on the curved triangular-strand wire rope's section are large,making it easier to achieve stress yield.The mechanical properties of the traditional circular wire rope 6×7+IWS are between those of the curved elliptic-strand wire rope and those of the curved triangular-strand wire rope.

关 键 词：椭圆股 三角股 6×7+IWS 弯曲状钢丝绳 几何建模 数值模拟 

分 类 号：TD532[矿业工程—矿山机电]