Abstract

Train traction and brake dynamics simulations can be used to improve the safety and efficiency of heavy haul transportation. Virtual models can be used to analyze many operational conditions that are expensive or inviable to be measured due to costs and security risks. This paper presents a low computational cost simulation model that encompasses the longitudinal dynamics equations and the pneumatic brake system behavior. The model is used to evaluate the effects of the locomotive traction/dynamic-brake and of the pneumatic brake delays in the draft gear forces. A real-world scenario was analyzed, in which a standard train control procedure was applied for 168 ore freight cars propelled by two locomotives. For this analysis, the model was able to perform up to 8 simultaneous parallel simulations with a processing time of 607 s to conclude a route of 2884 s, which is very suitable for this kind of investigation.

摘要

火车牵引力和制动动力学仿真可用于提高重型运输的安全性和效率。虚拟模型可用于分析许多因成本和安全风险而昂贵或无法衡量的运行状况。本文提出了一种低计算成本的仿真模型，该模型包含纵向动力学方程式和气动制动系统行为。该模型用于评估机车牵引力/动态制动的影响以及牵引力中的气动制动延迟。分析了一个实际场景，其中对由两台机车推动的168辆矿石货车应用了标准的火车控制程序。对于此分析，