A Study on the Design of Fundamental Brake System for High-speed Train

With the design of the fundamental brake for 270 km·h-1 highspeed train, the load mechanism, material performance and limit of disc braking power are calculated and analyzed based on tremendous tests and simulation computations. The braking force distributions in different cases of compound brake and air brake have been compared, and the brake cylinder pressure for motor car and the trailer is calculated. When 270 km·h-1 highspeed train applies the dynamic brake and the disc brake, the calculated stopping distance is 3 5147 m. It can satisfy the requirement of emergency stopping distance of less than 3 700 m at initial speed of 270 km·h-1. In addition, train running over 250 km·h-1 should adopt many other braking systems such as eddy current brake, electromagnetic rail brake at the same time, besides dynamic brake and disc brake. Through these measures, the load of disc brake can be reduced, the service life of the brake disc and brake pad prolonged, and the operational cost reduced.