Method for judging braking vibration stability of disc brake

The invention relates to the technical field of disc brake stability evaluation, and provides a disc brake braking vibration stability evaluation method which comprises the following steps: step 1, establishing a high-speed train disc brake dynamic simulation model; step 2, performing a simulation test on the dynamic simulation model of the disc brake of the high-speed train to obtain axial excitation response results of the brake disc under different brake parameters; 3, Fourier transform processing is conducted on the axial excitation response result of the brake disc, and an FFT axial excitation response frequency spectrum of the brake disc is obtained; 4, according to the FFT axial excitation amplitudes of the brake disc corresponding to different vibration frequencies in the axial excitation response frequency spectrum of the brake disc, the axial vibration impact degree and the axial vibration power of the brake disc at different moments are calculated; and 5, calculating a stability index. According to