Research and Analysis on Disc Brake Noise of High Speed Trains

Based on the self-excited vibration theory of mode coupling, the disc brake of trains is analyzed and studied as a whole, and a simplified model of brake disc and brake pad is established. By using ABAQUS complex eigenvalue analysis method, the relationship between system friction coefficient, braking speed, pressure, elastic modulus and contact rigidity is comprehensively considered and the friction noise of disc brake system is predicted by finite element method. The simulation results show that brake scream is more likely to occur at high friction coefficient, low speed and high pressure. Changing the elastic modulus and contact stiffness of brake disc will also affect the generation of brake scream, but there is no specific law, which depends on the coupling of system modes. It can be seen that the theoretical simulation of self-excited vibration based on mode coupling can be used to carry out cooperative analysis and study considering the matching of parameters. This idea provides a design direction for reducing braking noise.