Surface Structure Design of High Speed Heavy Duty Brake Disc Based on Topography Optimization

During the braking process of high-speed and heavy-duty brake discs, the surface of the brake disc will produce a certain displacement and stress. The purpose of improving the braking effect can be achieved by reducing the surface structure flexibility and increasing the surface heat dissipation speed. In this paper, through the static analysis of the brake disc under high-speed and heavy-load conditions, the brake disc displacement cloud map and stress cloud map are obtained, and the equivalent surface conditions are determined based on this. Based on the equivalent surface conditions of the brake disc, the surface topography optimization method was used to establish a mathematical model of multiple equivalent surface conditions at different braking positions during one cycle of braking. Combined with the mathematical model, the finite element model of the brake disc surface flexibility optimization under multiple working conditions is established, and the optimization results under the constraints of different pattern groups are compared, and the surface structure with the smallest optimized flexibility value is selected. The optimization results show that the surface flexibility of the brake disc before and after optimization is reduced by 82.91%. Based on the optimization results, the surface structure of the brake disc is reconstructed, and a surface structure that meets the requirements of minimizing the weighted flexibility of multiple operating conditions is designed.