论文部分内容阅读
在考虑冷桥影响的情况下,采用面积加权法对列车车体K值进行了计算.通过对车体结构的分析,建立了典型冷桥区域的物理模型,并采用有限单元法对冷桥模型进行了传热分析,得出冷桥影响区域以及影响区域内的平均热流密度值,最终求得整车的优化K值.对比未考虑和考虑冷桥的列车车体的K值可以发现,冷桥影响区域虽小,但对整车K值具有较大的影响.
Taking into account the influence of cold bridge, the area weighting method was used to calculate the K value of the train body.After analyzing the structure of the vehicle body, the physical model of the typical cold-bridge region was established and the finite element method The heat transfer analysis was carried out, and the average heat flux density in the affected area of the cold bridge and in the affected area was obtained, finally the optimal K value of the vehicle was obtained.Compared with the K value of the train body without considering and considering the cold bridge, Although the impact area of the bridge is small, it has a greater impact on the K value of the vehicle.