摘要
针对复杂的螺旋钢丝绞缆结构力学响应问题,建立了考虑局部接触变形的1×7结构三维绞缆离散元模型。首先,通过球体间黏结模型和连续体离散化方法将单根连续的钢丝离散为多个互相接触的球体;然后,通过螺旋线方程和旋转矩阵,构建了钢丝绞缆1×7结构的三维离散元数值模型,并与经典实验结果进行了对比验证;最后,通过构建的1×7结构的钢丝绞缆离散元模型分析了不同螺旋角对钢丝绞缆力学行为的影响。结果表明,螺旋角的增大会增加钢丝绞缆的等效杨氏模量和外层钢丝的轴向变形,降低外层钢丝和中心钢丝间的接触力。
In this paper,a 3D discrete element model of 1×7 wire rope with local contact deformation is established to solve the mechanical response problem of complex twisted structure under tensile deformation.First,a single continuous wire is discretized into multiple spheres by cohesive bond model between spheres based on the discretization method of continuum.Then,3D discrete element model of 1×7 wire rope is constructed by helix equation and rotation matrix,which is compared with the classical experimental results.Finally,the influence of helical angles on mechanical behavior of 1×7 wire rope is analyzed by the discrete element model.The results show that the increase of helical angle will increase the equivalent Young's modulus of rope and the axial deformation of the outer wire,and reduce the contact force between the outer wire and the center wire.
作者
杜微
刘彦杰
DU Wei;LIU Yanjie(Department of Strength Design,AVIC The First Aircraft Institute,710089 Xi'an,China)
出处
《应用力学学报》
CAS
CSCD
北大核心
2023年第6期1290-1297,共8页
Chinese Journal of Applied Mechanics
关键词
离散元法
螺旋结构
钢丝绞缆
改进黏结键模型
螺旋角
局部应变
等效杨氏模量
discrete element method
spiral structure
wire cable
improved cohesive bond
spiral angle
local strain
equivalent Young's modulus
