1. Continuous Pressure Waves Generated by a Train Running in a Tunnel
- Author
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Katsuhiro Kikuchi, Hajime Takami, Satoru Ozawa, and Masanobu Iida
- Subjects
Pressure wave ,Engineering ,Acoustics and Ultrasonics ,Field (physics) ,business.industry ,Mechanical Engineering ,Pressure data ,Acoustics ,Electrical engineering ,Building and Construction ,Field tests ,Geophysics ,Amplitude ,Incident wave ,Mechanics of Materials ,Separation method ,business ,Civil and Structural Engineering ,Test data - Abstract
This research describes several characteristics of tunnel continuous waves (TCW), which are a kind of low-frequency pressure wave radiated from railway tunnel portals. Several theoretical results are presented and measurement data obtained in field tests. Ratios of the amplitude and the frequency of the TCW radiated in the forward direction to those radiated backward have been obtained. Also described is a method for separating an incident wave from pressure data measured in a tunnel and this method is applied to data obtained in field tests. As a result, the separation method is shown to be applicable to the field test data.
- Published
- 2009