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Optimization of Train Nose Shape for Reducing Micro-Pressure Wave Radiated from Tunnel Exit:

Optimization of Train Nose Shape for Reducing Micro-Pressure Wave Radiated from Tunnel Exit: When a compression wave generated by a high-speed train entering a tunnel propagates through the tunnel and arrives at the tunnel exit, an impulsive pressure wave (micro-pressure wave) is radiated from the tunnel exit. Improving the train nose shape is one of the techniques for suppressing the micro-pressure wave. Furthermore, tunnel entrance hoods are required for long concrete slab tunnels in order to suppress the micro-pressure wave. The effect of the tunnel entrance hood on the compression wave generated by the train can be evaluated by means of a rapid computational scheme devised and validated experimentally by Howe et al. In this study, the optimal longitudinal distribution of the cross-sectional area of the train nose shape was determined by using the rapid computational scheme and a genetic algorithm. The effect of the nose shape optimization was confirmed through experiments using scale models. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Low Frequency Noise, Vibration and Active Control SAGE

Optimization of Train Nose Shape for Reducing Micro-Pressure Wave Radiated from Tunnel Exit:

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Publisher
SAGE
Copyright
Copyright © 2019 by SAGE Publications Ltd unless otherwise noted. Manuscript content on this site is licensed under Creative Commons Licenses
ISSN
2048-4046
eISSN
2048-4046
DOI
10.1260/0263-0923.30.1.1
Publisher site
See Article on Publisher Site

Abstract

When a compression wave generated by a high-speed train entering a tunnel propagates through the tunnel and arrives at the tunnel exit, an impulsive pressure wave (micro-pressure wave) is radiated from the tunnel exit. Improving the train nose shape is one of the techniques for suppressing the micro-pressure wave. Furthermore, tunnel entrance hoods are required for long concrete slab tunnels in order to suppress the micro-pressure wave. The effect of the tunnel entrance hood on the compression wave generated by the train can be evaluated by means of a rapid computational scheme devised and validated experimentally by Howe et al. In this study, the optimal longitudinal distribution of the cross-sectional area of the train nose shape was determined by using the rapid computational scheme and a genetic algorithm. The effect of the nose shape optimization was confirmed through experiments using scale models.

Journal

Journal of Low Frequency Noise, Vibration and Active ControlSAGE

Published: Mar 1, 2011

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