DETERMINATION OF LONGITUDINAL FORCES IN CONTINUOUS WELDED RAIL TRACK USING HORIZONTAL CURVATURE MEASUREMENT OF THE RAIL BENT

The proceedings of the last Railway Engineering conference included the results of investigations carried out at the Gdansk University of Technology related to the determination of strength characteristics of continuously welded rail (CWR) track during control of the track axis. Both the experimental tests and the numerical analysis have proved that the determination of longitudinal forces in CWR tracks is possible by use of the curvature measurement of the rail displaced horizontally by tamping machine. There has been designed and made adequate apparatus for determining the horizontal curvature. The operational characteristic of the tamping machine provides facilities for the apparatus to measure the track displacements in such a way that it is possible to separate the rail horizontal and vertical displacement components from the measuring signal. For this purpose a special structure was designed to connect the detecting element with the rail head. To convert the mechanical measuring magnitude to electric voltage value, advantage was taken of differential / capacitance and induction sensors. This type of structure is resistant to any damage resulting possibly from excessive displacements of the track grate and surpassing the measuring range. A testing signal from the sensor is transferred by screened cable to the central electronic circuit to be next registered in the computer. For the curvature measurements use was made of three sensors to test the lateral displacements of the track at some selected characteristic points. The measuring apparatus is installed in the tamping machine without making any constructional changes in the machine. Both the assembly and the disassembly take little time. By applying the elaborate instrumentation it was possible to perform series of curvature measurements at a stationary testing station and during the machine's current operation in the testing railway track in use. For the covering abstract see ITRD E123761.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0947644512
• Corporate Authors:

  ENGINEERING TECHNICS PRESS

  46 CLUNY GARDENS
  EDINBURGH,   United Kingdom  EH10 6BN
• Authors:
  • KOC, W
  • GRULKOWSKI, S
  • WILK, A
  • DOBROWOLSKI, P
  • KOSTRO, G
• Publication Date: 2003

Language

• English

Media Info

• Features: References;
• Pagination: 12 p.
• Monograph Title: EMBEDDED SLAB TRACK TEST TRACK IN SPAIN: CONSTRUCTION OF A LOW MAINTENANCE CONCRETE SLAB TRACK
• Serial:
  • PROCEEDINGS OF THE INTERNATIONAL CONFERENCE AND EXHIBITION RAILWAY ENGINEERING 2003, HELD LONDON, UK, 30 APRIL - 1 MAY 2003 - CDROM
  • Publisher: ENGINEERING TECHNICS PRESS

Subject/Index Terms

• TRT Terms: Condition surveys; Conferences; Information processing; Measuring instruments; Railroad tracks; Sensors; Strength of materials; Welding
• ITRD Terms: 6155: Apparatus (measuring); 3857: Condition survey; 8525: Conference; 8655: Data processing; 1062: Railway track; 6120: Sensor; 5544: Strength (mater); 3852: Welding
• Subject Areas: Data and Information Technology; Railroads;

Filing Info

• Accession Number: 00985582
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• ISBN: 0-947644-51-2
• Files: ITRD
• Created Date: Feb 4 2005 12:00AM