A TWO-DIMENSIONAL METHOD FOR CALCULATING UNSTEADY PRESSURE DISTRIBUTIONS ON RAILROAD TRAINS

EIN ZWEIDIMENSIONALES VERFAHREN ZUR BERECHNUNG INSTATIONAERER DRUCKVERTEILUNGEN AN EISENBAHNZUEGEN

A method is discussed for calculating unsteady aerodynamic phenomena occurring upon the encounter of high speed railroad trains and on their entering a tunnel; it is based upon two-dimensional potential flow. A singularity method is used for calculation of the potential as a function of time and the contour velocity, incorporating source distributions on body contours (trains, tunnel walls). Tail contours are open to approximate effects of wake flow. The coefficient of the unsteady static pressure is formed by accounting for the potential variation in time. Longitudinal and lateral forces, as well as the moment, result from the integration of the pressure distribution. A FORTRAN program is described.

• Corporate Authors:

  Deutsche Forschungs-u Versuchsanst f Luft-u Raumft

  Brunswick,   Germany 
• Authors:
  • Steinheuer, J
• Publication Date: 1977-5

Language

• German

Media Info

• Pagination: 92 p.

Subject/Index Terms

• TRT Terms: Aerodynamic force; Aerodynamics; Air resistance; Computer programming; Computer programs; Double track; Environmental quality; High speed rail; Mathematical analysis; Potential flow; Pressure; Railroad transportation; Rapid transit; Train track dynamics; Tunnels; Two dimensional flow; Unsteady flow; Variables
• Identifier Terms: FORTRAN (Computer program language)
• Uncontrolled Terms: Pressure distribution
• Old TRIS Terms: Aerodynamic effects; Incompressible flow; Rapid transit systems; Singularity mathematics; Tunnel environment
• Subject Areas: Bridges and other structures; Construction; Environment; Public Transportation; Railroads; Vehicles and Equipment;

Filing Info

• Accession Number: 00175299
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: DLR-IB-151-77/8
• Files: TRIS
• Created Date: May 31 1981 12:00AM