索道钢丝绳编接的受力分析与计算

Force analysis and calculation of cableway wire rope splice

钢丝绳编接分短编接和长编接2种方法,国家规范规定编接长度不小于钢丝绳绳径的1 200倍,插入段长度不小于钢丝绳绳径的60倍。运用接触力学的方法研究索道钢丝绳编接处的摩擦力,钢丝绳编接是靠摩擦力编在一起的,摩擦力的计算需要求出绳股的径向压力,对绳股径向压力和摩擦力进行分析。摩擦带材质的弹性模量对摩擦力的计算影响不大,最大压应力与受压后所形成的宽度成反比。试算得出钢丝绳编接处所产生的摩擦力,其安全系数与钢丝绳最大拉力的安全系数几乎相等,当拉力减小时,摩擦力减小,安全系数几乎不变。指出钢丝绳编接必须从理论研究和试验检验2个方面研究才能保障其安全性能。

Wire rope splice is divided into two method of long splice and short splice, national standard rules that splice length is no less than 1 200 times of wire rope diameter, insertion length is no less than 60 times of wire rope diameter. The friction force of cableway wire rope splice part is researched by using contact mechanics method, wire rope is spliced with friction, the calculation of friction needs to calculate radial pressure of rope and strand, and analyze the radial pressure and friction of rope and strand. The elastic modular of friction belt material has little influence on friction calculation, the maxi- mum pressure stress is in inverse proportion to width formed after pressure. The fraction produced in wire rope splice part is calculated, its safety factor is almost the same as the safety factor of wire rope maximum tension, when tensile force is re- ducing, friction is reducing, and safety factor is almost the same. It is pointed out that wire rope splice should be studied from theoretical research and test inspection two aspects in order to guarantee its safety properties.