Identifying the characteristics of high-speed railway by an on-board measurement of the noise and vibration from the wheel and railway interaction

초록

The purpose of this paper is to identify characteristics of a high-speed railway by a simple on-board wheel noise and axle-box vibration measurement setup with some signal processing techniques. The noise and vibration of a train on a railway is generally governed by an interaction of wheel and railway, and they are caused by several railway conditions such as surface roughness, track alignment, points, sleepers, and beds. If an appropriate signal processing method is applied to their measurement, it is possible to identify their characteristics. A first step to the identification, the wheel noise and the axle-box vibration are measured with a microphone and accelerometers in high-speed running. The measured signals are post-processed by some time-varying random signal analysis, because of their non-stationary random behavior. From the analysis, it is confirmed that characteristics of a high-speed railway can be identified by a simple on-board noise and vibration measurement setup with some time-varying random signal analysis.