Research on Brake Disk Heat Dissipation Rib Arrangement Spacing for High-speed Railway Train

Abstract

Objective As the design speed of trains reaches 400 km/h level, the flow field environment under the train becomes more complex, highlighting the issues such as increased brake disc resistance and power consumption. It is imperative to conduct in-depth research on the optimal arrangement spacing of train brake disc heat dissipation ribs at this speed level. Method Using a cylindrical heat dissipation rib structure as the basis, a model is established through finite element simulation, inputting relevant parameter values. Four calculation conditions are set for the center-to-center distance (dc) circumferentially between adjacent heat dissipation ribs, and five calculation conditions are set radially for the distance (dr) between adjacent heat dissipation ribs. Various dc and dr values are calculated respectively for their impact on brake disc temperature rise, resistance, and heat dissipation power. It is aimed to determine recommended values for both dc and dr. Result & Conclusion When dr equals 40 mm (i.e. the ratio of the distance between the heat dissipation ribs and the brake disc edge to the brake disc diameter is 0.75), the brake disc temperature rise reaches the lowest value, indicating the optimal performance of brake disc. For heat dissipation ribs with a diameter equal to half of dc, the brake disc demonstrates the best overall performance