INTERACTION BETWEEN VEHICLES AND TRACK. POWER SPECTRAL DENSITY OF TRACK IRREGULARIES. PART 1 - DEFINITIONS CONVENTIONS AND AVAILABLE DATA

The excitation of the track can be introduced into mathematical models in the form of "power spectral density of track irregularities" showing the relative importance of the various frequencies comprising the whole of the irregularities for a given section of track. A first stage for obtaining these spectra consists of recording the track irregularities by means of measuring vehicles, and a second stage consists of establishing these spectra by means of mathematical procedures (analogue and digital). The rules for the presentation of these spectra are laid-down and the spectra envelopes obtained by different Administrations are given. Numerous problems remain to be solved e.g. those relating to the stationarity of the records, to the influence of certain parameters (axle-load, measuring speed, wheel and rail profiles). For high speeds, it is also necessary to possess spectra in the low frequency field.

• Supplemental Notes:
  • Restrictions on the use of this document are contained in the explanatory material.
• Corporate Authors:

  International Union of Railways

  Office of Research and Experiments
  Utrecht,   Netherlands 
• Publication Date: 1971-10

Media Info

• Features: Figures; References; Tables;
• Pagination: 22 p.

Subject/Index Terms

• TRT Terms: Data collection; Defects; Mathematical models; Power spectra; Railhead; Railroad tracks; Train track dynamics
• Old TRIS Terms: Question c116; Rail head profile; Track irregularities; Track profile
• Subject Areas: Data and Information Technology; Railroads;

Filing Info

• Accession Number: 00052798
• Record Type: Publication
• Source Agency: International Union of Railways
• Report/Paper Numbers: C116/RP 1/E
• Files: TRIS
• Created Date: May 14 1976 12:00AM