Abstract
An impulsive pressure which is called a micro-pressure wave radiating from a tunnel exit is one of the important environmental problems in high speed railways. The magnitude of the impulsive depends on the waveform of compression at the tunnel exit; the steeper the wavefront of the compression wave, the larger the impulsive wave. In our previous study, the distortion of compression during its propagation through a slab track tunnel was investigated by one dimensional numerical analysis which took account of steady and unsteady wall friction and of heat transfer to the tunnel wall. As a result, it is shown that verification of effects of short side branches arranged at side walls of tunnel is needed to predict the distorsion of waveform. In this study, the effects of short side branches are analyzed by acoustic analysis and included in numerical analysis. The results show that the numerically obtained waveforms agree well with field measurements which are obtained from a slab track tunnel of Shinkansen.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
