Dynamic spectrum analysis of high-speed train passenger compartment luggage rack noise

In order to understand the dynamic changes of vibration radiation noise of high-speed train's passenger compartment luggage rack, 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 luggage rack vibration radiation noise, and it is sensitive to the changes of train operation status, operation speed and track condition, thus this method can be extended to noise measurement and analysis of the passenger compartment, at the same time, it has important application value on the monitoring of train operation status and comfort level evaluation of passenger compartment noise.