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.
- Restrictions on the use of this document are contained in the explanatory material.
International Union of RailwaysOffice of Research and Experiments
- Publication Date: 1971-10
- Features: Figures; References; Tables;
- Pagination: 22 p.
- TRT Terms: Data collection; Defects; Mathematical models; Power spectra; Railhead; Railroad tracks; Train track dynamics
- Non-Preferred Terms: Power spectral density; Spectral density; Spectral energy distribution
- Old TRIS Terms: Question c116; Rail head profile; Track irregularities; Track profile
- Subject Areas: Data and Information Technology; Railroads;
- 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