基于气动方程的列车管路充排气数学模型

Charging and Exhaust Mathematical Model of Train Pipeline Based on Aerodynamic Equation

摘要:

智能化制动试验系统的核心是建立不同编组列车首车制动压力控制模型。从气动力学方程入手，建立了不同编组列车首车列车管充排气特性数学模型，该模型考虑了编组列车除首车之外的其余车辆充排气特性对首车列车管气压变化的影响。提出通过对制动阀有效截面积的设计计算，并带入所建立的数学模型中进行仿真试验，从而对研制新制动阀以及改进或检修制动阀提供理论基础与技术指导。利用列车制动试验台得到的试验数据与仿真结果进行对比分析，验证模型的准确性，并预测了更长编组列车首车列车管的初充气及常用制动时的气压数据。

Abstract:

The intelligent brake test system's core is to establish the first vehicle brake pressure control model for different marshaling trains. A mathematical model of the first train tube in different marshaling trains is established based on the aerodynamic equation. The model takes into account the influence of the filling and exhaust of other vehicles on the tube pressure change of the first train. The brake valve's effective cross-sectional area is designed， calculated， and tested in a simulation using the established mathematical model. This provides a theoretical basis and technical guidance for developing new brake valves， as well as improving or repairing existing ones. To verify the accuracy of the model， test data obtained from the train brake test bench is compared and analyzed with the simulation results. The initial inflation data of the first train tube in long groups and the common brake pressure data were predicted and obtained.