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建立了矿井提升系统的动力学模型,通过模态分析方法计算得出系统的动态特性参数,并讨论了不同工况下的动载响应特性。由所建立的动力学方程组,推导出下降制动和上升制动工况时钢丝绳的动载响应解析表达式及最大动载荷的计算式,揭示出矿井提升机动态设计的各参数匹配机理和设计内涵。利用Simulink仿真工具箱对系统进行了动态仿真,并将理论计算值与仿真结果进行分析比较,结果表明,两者较为接近。文中的理论与方法为按静强度设计的动载系数的取值提供了理论计算依据,并为按动强度设计提供了载荷时间历程,具有一定工程应用价值。
The dynamic model of mine hoisting system was established. The dynamic characteristic parameters of the system were calculated by modal analysis and the dynamic response characteristics under different operating conditions were discussed. Based on the established dynamic equations, the analytic expression of dynamic response and the calculation formula of the maximum dynamic load of wire ropes during the descending and the rising braking conditions are deduced, and the matching mechanism of various parameters of the dynamic design of the mine hoist is revealed. Design content. The system was simulated by using Simulink simulation toolbox, and the theoretical calculation and simulation results were analyzed and compared. The results show that the two are close to each other. The theory and method in this paper provide a theoretical basis for the calculation of the dynamic load coefficient according to the static strength design, and provide the load time history for the design of the impact strength, which has certain engineering application value.