基于AMESim和ABAQUS的机车制动系统研究

Study on locomotive brake system based on AMESim and ABAQUS

为提高机车的制动性能,将MK20防抱死系统应用于液压盘式制动器,通过AMESim和ABAQUS对制动系统进行数值模拟研究。采用MATLAB求解出Oldrich Polach模型,得出粘着系数、蠕滑率与机车速度之间的关系;基于轮轨粘着机理建立制动防抱死数学模型,通过AMESim得出机车在常规制动和防抱死制动条件下的轮轨粘着系数和制动距离;运用ABAQUS建立制动器的温度-位移耦合模型,得出制动盘在不同条件下的瞬态温度场。研究结果表明,防抱死系统的应用可明显提升机车轮轨间的粘着系数利用率,降低制动盘的瞬态最高温度,对于提高机车的运载能力有着重要的意义。

In order to improve the locomotive braking performance,MK20anti-skid brake system(ABS)is used in hydraulic disc braker,and the braking effect is researched with numerical simulation method based on AMESim and ABAQUS software.The Oldrich Polach model is solved out by using MATLAB,and the relationship among adhesion coefficient,creep rate and locomotive speed.The ABS mathematical model is established based on wheelrail adhesion mechanism,the adhesion coeffi cient and braking distance of conventional braking and anti-skid braking is simulated by AMESim.The temperature-displacement coupling model of braker is established,and the brake disc transient temperature field is obtained under different working condition by ABAQUS.The research results indicate that ABS obviously improves the adhesion utilization,and lowers the brake disc transient highest temperature,which has great significance for improving locomotive carrying capacity.