列车变坡点地段平稳操纵研究

为了研究列车变坡点地段的车钩力分布规律,减少铁道车辆在变坡点地段的断钩事故,制定变坡点地段平稳操纵方案.采用多质点建模理论对西康线上某次货运列车进行纵向动力学建模,仿真分析列车牵引力、电制力、坡道阻力并对4种典型变坡点地段的车钩力变化规律展开研究.仿真与试验结果对比表明:所建立的模型能够再现列车牵引力、电制动力和坡道阻力;上坡道变坡点地段,在上坡前提前增大牵引手柄级位能防止因位能变化而引起的纵向冲动;下坡道变坡点地段,在列车部分进入下坡道时进行牵引工况到惰行工况的转换能避免因牵引力卸载而引起的纵向冲动;鱼背式变坡点地段,在列车全部进入上坡道后进行惰行工况到牵引工况的转换能最大程度减小车钩力变化率;锅底式变坡点地段,在列车全部进入上坡道后进行惰行工况到牵引工况的转换能最大程度减小车钩力变化率.

Research on Smooth Maneuvering Scheme for Long Trains on Slopes

In order to study the distribution law of coupler forces at train changing point locations and reduce the number of railway car hook breaking accidents at changing point locations, a stable maneuvering scheme for changing point locations was developed. This article uses the multi-mass modeling theory to model a freight train on the Xikang line in longitudinal dynamics, simulates train traction, electric braking force, and slope resistance, and conducts research on the variation of coupler forces in four typical variable slope points. The comparison between simulation and experimental results shows that the model established in this paper can reproduce the train traction, electric braking force and slope resistance; on the slope of the uphill slope, increasing the traction handle level in advance before going uphill can prevent changes in positional energy The longitudinal impulses caused by the change; the section of the downhill slope change point, when the train part enters the downhill slope, the traction condition to the idle mode can be converted to avoid the longitudinal impulses caused by traction unloading; After the train enters the uphill slope, the conversion from the idle mode to the traction mode can minimize the rate of change of the coupler force. For the pot-type slope change point section, after the train has entered the uphill slope, the idle mode is reached. The change of traction conditions can minimize the change rate of the coupling force.