货运列车列车管制动响应解析

Analysis of Brake Response of Freight Train Pipe

摘要:

为推导长大货运列车在制动工况下不同位置列车管的气压变化情况，以单机车控制、装载120型制动机的货运列车车辆的列车管为研究对象，基于气体流动方程构建列车管简化解析模型与AMESim仿真模型，并以短编组的制动实验数据进行模型校正，通过关键参数拟合外推及AMESim模型级联对长编组下不同位置列车管的制动响应进行预测，并与实验数据比较。结果表明，结合参数外推的解析模型预测曲线与实验结果基本一致，最大误差小于5 %，解析模型可实现对长编组列车管响应的快速预测；AMESim模型得到的各响应曲线较为准确，最大误差小于3 %，且对于中后段列车管的预测结果较好，可准确预测长编组车辆的列车管制动响应情况。

Abstract:

To deduce the variation in train pipe pressure at different positions in long-formation freight trains during braking， a simplified analytical model and an AMESim simulation model were developed based on gas flow equations. These models simulate a freight train controlled by a single vehicle and equipped with 120 brakes. Models structures and key parameters were calibrated using short-formation experiment data and then extrapolated to predict the brake response of train pipes at different positions in long formation. The results show that the analytical model， after parameter extrapolation， closely aligns with experiment data， with a maximum error of less than 5 %. The model can achieve rapid prediction of pressure changes in the train pipe. The AMESim model demonstrates even higher accuracy， with a maximum error of less than 3 %， particularly effectively predicting the brake responses at the middle and rear sections of the train pipe in long formations.