Dynamic spectrum analysis of bogie noise of high-speed train

In order to understand the dynamic changes of bogie noise and its contribution to condition monitoring and the influence on the passenger comfort, the dynamic spectrum is used for analysis and research. Dynamic spectrum is a three-dimensional spectrum which is build on the time - frequency analysis, the research results show that the dynamic spectrum can fully reflect the time varying characteristic, spectral structure and dynamic range of bogie noise, and it is sensitive to the changes of train operation status, operation speed and track condition, bogie running noise is one of the main noise source high-speed train, thus research results has important application value on noise reduction, the monitoring of train operation status and comfort level evaluation of passenger compartment noise.