超深井提升机钢丝绳拉力强度预测研究

Forecast on Tension Strength of Steel Wire Ropes for Ultra-deep Mine Hoist

超深井提升机长距离、粗直径钢丝绳在作业过程中受力复杂,建立精确的钢丝绳模型对提高提升系统安全性能至关重要,由于长距离、粗直径钢丝绳具有不同数量级抗拉刚度和抗弯刚度的宏观力学特性,在有限元数值仿真中对粗直径钢丝绳建模仍存在难题。为解决上述问题,因此提出了基于空间杆梁有限元模型的单元耦合建模方法,并进行了力学算例验证。根据1500m超深井提升机系统结构与运行参数,采用单元耦合建模与动力学分析方法进行了钢丝绳和罐笼联合结构作业过程分析,获得了在系统提升、下放作业过程中的钢丝绳张力变化规律和动态特性。研究结果表明在加速度突变阶段,钢丝绳的拉力强度变化最剧烈,钢丝绳张力呈现逐渐减弱的波动性变化。

The long steel wire rope with large diameter for ultra -deep mine hoist bears complex loading force in operation process. It is important to establish an accurate steel wire rope model for improving the safety of the lifting system. Due to the different magnitude of tensile rigidity and bending stiffness, which is one of the mechanical properties of long steel wire rope with large diameter, building the steel wire rope with large diameter finite element model in numerical simulation is still a problem. In order to solve the problem, the modeling methods of coupling element were put forward based on space link - beam model of finite element model, and the method was verified by the mechanical simulation. Based on the structure and system parameters of the 1500 meters ultra -deep mine hoist, dynamic analysis on joint structure in operation process was carried out with the coupling element model, the tension change and dynamic characteristics of the steel wire rope in the lifting and dropping processes were obtained. The results indicate that the tension strength of steel wire rope changes intensely in the stage of abrupt acceleration change, in that case, the stress of steel wire rope is undulated and gradually weakened.