基于数值模拟计算的A型动车组围护结构传热系数优化计算

运用数值模拟的方法对A型动车组各典型断面进行传热分析,并计算了车体围护结构的传热系数及各断面的权重。由计算结果可知,空调车厢有窗断面的权重传热系数最大,空调车厢有门断面及受电弓处有门断面的权重传热系数较大。分析了权重传热系数大的原因,提出采用热导率较小的玻璃、并适当增大双层玻璃中空气层厚度等措施来提高窗户处的保温性,提出车门框架采用热导率更小的材料来改善车门处的保温性,并提出增大受电弓处的车厢顶部保温层厚度来增强保温效果。

K-value Optimization Calculation of Type A High-speed Train Based on Numerical Simulation

Numerical simulation is used to analyze the heat transfer for Type A high-speed train and typical sections,the heat transfer coefficient of the train envelope structure and the weight average of each section are also calculated.The reasons of larger heat transfer coefficient for section weight are analyzed,new measures like the use of low thermal conductivity glass and good materials,increasing the thickness of top layer thermal insulation are proposed to improve the heat preservation for train windows,doors and the passenger compartment.