Lanzhou Jiaotong University
Natural Science Foundation of Gansu Province(20JR5RA400)
In order to study the high-frequency noise generated by the hump car retarder when braking the rolling train, taking the hump car retarder as the research object, the finite element analysis model of the braking system was established in ABAQUS software. The complex eigenvalue analysis theory was used to investigate the stability of the braking system, and the distribution of the unstable modes of the vibration system in the frequency domain was obtained. The braking squeal noise was collected on site and its main vibration frequency was analyzed. The relative error was obtained by comparing with the theoretical prediction results. Combined with the bifurcation curve of the vibration frequency and the coupling of the vibration modes, the factors affecting the unstable modes of the braking system were analyzed. The results show that when the friction coefficient of the contact surface between the brake rail and the wheel increases in the range of 0.07 ~ 0.17, the tendency of squeal noise in the braking system increases. At the same time, when the lateral force exerted by the brake rail on the wheel increases in the range of 50 ~ 260 kN, it also has the same impact on the brake system. The initial speed of the braked vehicle has no obvious effect on the tendency of squeal noise. It is concluded that the changes of friction coefficient and braking rail force have an important impact on the tendency of vehicle reducer to produce high-frequency braking noise during braking.
范家骅,朱大鹏. 驼峰车辆减速器制动噪声的复特征值分析[J]. 科学技术与工程, , ():复制