摘要
如果一个钢丝绳捻距包含n个股捻距,通过微分几何建模与物理分析,理论上导出同向捻、交互捻钢丝绳中二次螺旋钢丝相对钢丝绳轴线转角周期计算公式依次为Tw=2π/n-1、Tw=2π/n+1。计算机仿真结果表明,调整钢丝绳捻距倍数、股捻距倍数不能使相同结构不同捻法钢丝绳中二次螺旋钢丝转角周期相等。钢丝绳结构相同,同向捻时二次螺旋钢丝转角周期相对较大,这意味着交互捻时钢丝绳中二次螺旋钢丝挠率、曲率、工作应力变化频次较高,因而使同向捻钢丝绳表现出疲劳性能优于交互捻的捻法优势。
If a wire rope lay length contains n times lay lengths in strand,theoretically derived by differential geometric modeling and physical analysis,the formula for calculating the angle period of secondary spiral steel wire in ordinary lay to the wire rope axis in the Lang lay wire rope is Tw=2π/n-1 and Tw=2π/n+1.The computer simulation shows that adjusting lay length multiple of wire rope and lay length multiple of strand will not make the angle cycle of secondary spiral wire in same construction different lay type wire rope the same.For the same construction steel wire rope,the second spiral steel wire angle cycle in the Lang lay steel wire rope is relatively large,which means that the torsion,curvature,and stress of the secondary spiral steel wire angle cycle in the ordinary lay wire rope are relatively high.Therefore,the Lang lay steel wire rope shows fatigue performance superior to that of ordinary lay.
作者
沈志军
秦万信
于渊博
Shen Zhijun;Qin Wanxin;Yu Yuanbo(Xianyang BOMCO Steel Tube&Wire Rope Co.,Ltd.,Xianyang 712000,China)
出处
《金属制品》
2019年第6期1-7,共7页
Metal Products
关键词
钢丝绳
捻法
转角周期
微分几何
二次螺旋钢丝
wire rope
lay type
angle cycle
differential geometry
secondary spiral wire
