HYDRAULIC ANALOGY STUDY OF WAVES IN TUNNELS

As a train enters a tunnel at high velocities, a pressure wave is built up ahead of it. The pressures involved may be so high as to cause the train to slow down and to cause damage to the train and the tunnel. In order that trains be used at high velocities, it is necessary to find a way to relieve these pressure waves. A study was made of a technique for measuring these pressure waves and of some data for a typical train configuration. The technique consists of making measurements on a free-surface water table of a model geometrically similar to actual trains. This gives information about the pressure waves around trains travelling on the ground through air. The results indicate that valid information can be obtained from the water table and that the water table can be ultimately used towards reducing the magnitude of the pressure waves. (Author)

• Corporate Authors:

  Massachusetts Institute of Technology

  Engineering Projects Laboratory
  Cambridge, MA  United States 
• Authors:
  • Suo, M
  • Jacobs, P
• Publication Date: 1966-11-1

Media Info

• Pagination: 55 p.

Subject/Index Terms

• TRT Terms: Aerodynamics; High speed rail; Intelligent transportation systems; Pressure waves; Tunnels; Wave motion
• Old TRIS Terms: Advanced systems
• Subject Areas: Bridges and other structures; Operations and Traffic Management; Railroads;

Filing Info

• Accession Number: 00039008
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: DSR-76111 Final Rpt
• Contract Numbers: C-85-65t
• Files: TRIS
• Created Date: Nov 24 1973 12:00AM