Frequency analysis of the vibration of tread brake dynamometer for the high speed train

This paper deals with the frequency analysis of the abnormal vibration of the specific speed range when the tread brake test is applied in the brake dynamometer. Generally brake system of railway vehicles has a crucial role for the safety as well as riding quality of passengers. And dynamometers are widely used to simulate and test the vehicle brake system performance including the emergence brake. Experiments on the brake dynamometer for the high speed train are provided to illustrate the frequency analysis of the abnormal vibration in vehicle speed at 140 [km/h] and 70 [km/h] under the 920 [mm] wheel diameter using the 3-axis accelerometers.