机车通过固定辙叉动力学性能

Dynamic Performance of Locomotive Passing Through Fixed Frog

为研究过岔方式及过岔速度对机车通过固定辙叉时的动力学性能的影响,分析固定辙叉伤损原因,基于铁路车辆系统动力学理论,采用75 kg/m钢轨12号道岔固定辙叉和JM3标准车轮型面,应用SIMPACK软件建立机车-固定辙叉系统动力学模型。分析机车在不同速度、从不同方向通过固定辙叉时的动力学性能。结果表明:机车通过固定辙叉时,垂向力、磨耗数的速度敏感区主要在70~80 km/h。脱轨系数的速度敏感区主要在90~100 km/h。提高速度会降低机车运行稳定性,增大脱轨风险,加重轮轨磨耗。在相同速度下,机车逆向过叉时的运行平稳性较差,脱轨风险较大,轮轨磨耗较严重。

In order to study the influence of crossing mode and crossing speed on the dynamic performance of locomotive passing through fixed frog and analyze the damage causes of fixed frog,based on the theory of railway vehicle system dynamics,the dynamic model of locomotive fixed frog system was established by using SIMPACK software with fixed frog of No.12 turnout,75 kg/m rail and JM3 standard wheel tread.The dynamic performance of locomotive passing through fixed frog at different speeds and in different directions was analyzed.The results show that when the locomotive passes through the fixed frog,the speed sensitive area of vertical force and wear number is mainly between 70 km/h and 80 km/h.The speed sensitive area of derailment coefficient is mainly between 90 km/h and 100 km/h.The raising of the speed will reduce the stability of locomotive operation,increase the risk of derailment and the wheel rail wear.When the locomotive runs at the same speed,the operation stability of the locomotive is poorer,the risk of derailment is higher,and the wheel rail wear is more serious during the running in reverse direction.