摘要
基于可变半径方法推导直线状椭圆股钢丝绳参数方程,建立4+10+15弯曲状的椭圆股钢丝绳数学模型和有限元模型,并对绳端施加集中载荷作承载工况,分析不同捻角弯曲状椭圆股钢丝绳等效应力和变形的分布规律。仿真结果表明:中心丝和外层丝等效应力会随股绳捻角的增加而增大,整绳应力主要分布于中心丝;外层丝的旋向影响钢丝绳与弯曲绳槽间力学性能,进而导致椭圆股钢丝绳截面外层丝等效应力分布不均;捻角会影响钢丝绳伸长量,12°、16°和20°捻角弯曲状股绳伸长量分别为0.063 mm,0.092 mm,0.134 mm,捻角越大,钢丝绳刚度越小。该研究为其他异股钢丝绳建模及性能分析提供理论参考。
Based on the variable radius method,the parameter equation of straight elliptical strand wire rope is deduced,and the mathematical model and finite element model of the 4+10+15 curved elliptical strand wire rope are established.The distribution of equivalent stress and deformation of the curved elliptical strand wire rope with different twist angles is analyzed by applying concentrated load on the end of the rope.The results show that the equivalent stress in the center wire and the outer wire increases with the increasing strand twist angle,and the stress in the whole rope is mainly distributed in the center wire.The rotation direction of the outer wire affects the mechanical properties between the wire rope and the bending groove,resulting in the uneven distribution of the equivalent stress in the outer wire of the elliptical strand wire rope section.The twist angle will affect the elongation of the wire rope.The elongation of the bent strands at 12°,16°and 20°twist angles are 0.063 mm,0.092 mm and 0.134 mm,respectively.The greater the twist angle is,the smaller the stiffness of the wire rope is.The study results can provide useful reference for modelling and performance design of the other similar wire ropes.
作者
张武
吕常磊
刘卫雄
ZHANG Wu;Lü Changlei;LIU Weixiong(School of Mechanical Engineering,Xi'an University of Science and Technology,Xi'an 710054,China)
出处
《机械设计与研究》
CSCD
北大核心
2022年第2期210-214,共5页
Machine Design And Research
基金
西安市科技计划项目(2019217714GXRC013CG014-GXYD13.7)。
关键词
弯曲
椭圆股钢丝绳
不同捻角
应力
forniciform
spiral oval strand rope
different twist angles
stress
