Comparative Analysis of Vibration Transmission Characteristics in Different Areas of Metro Depots
In order to reduce the environment vibration and secondary noise of the subway superstructure,the vibration characteristics of different areas of the depot under the subway superstructure property were studied.Based on the comparative analysis of the vibration test results of the superstructure property of the subway depot in a city in China,the vibration characteristics of different areas of the depot,including the rails,track-side columns and the vibration source at 7.5m away from the central line of the track in the characteristic area of the line,throat area line and test line,were obtained,and the vertical and lateral vibration spectra of these areas were analyzed and compared.At the same time,the vibration attenuation in different frequency bands was analyzed to obtain the vibration characteristics of different areas of the depot.The results show that the total vibration level of the test line is the largest(123.1 dB),followed by the throat area(113.0 dB),the lowest total vibration level(94.1 dB)is inside the depot.Although some lines in the throat area and the test line area have implemented some vibration damping measures,compared with the warehouse area,they are still the main areas of vibration and noise problems in the depot.When paying attention to superstructure vibration,it is especially necessary to control the vibration in 6-63 Hz frequency range.Targeted control of vibrations in different areas can mitigate vibration and noise problems more efficiently.
vibration and wavedepotsuperstructure propertyon-site measurementvibration spectrumdata analysisoctave band
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