BRAKING AND ACCELERATION FORCES ON BRIDGES. MAGNITUDE AND DISTRIBUTION OF BRAKING AND STARTING FORCES IN THE TRACK

This report describes tests made by the NS to ascertain the magnitude of the longitudinal forces during braking and their distribution in ballasted track. Measurements were taken during braking and starting of a locomotive on standard track. The tests confirmed that the greatest braking forces were produced at the moment the vehicle was stopped. Maximum value of the coefficient of friction during braking was mu = 0.33 and, that during starting, mu = 0.37. It was also shown that a significant portion of the longitudinal force is transmitted through the rails and hence to the permanent way ahead and behind the locomotive. Comparison of corresponding values gave conditions similar to those determined by the D 71 Committee in another connection.

• 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: 1969-10

Media Info

• Features: Figures; Tables;
• Pagination: 16 p.

Subject/Index Terms

• TRT Terms: Acceleration (Mechanics); Braking; Braking performance; Coefficient of friction; Diesel locomotives; Tests; Train track dynamics
• Identifier Terms: Nederlandse Spoorwegen
• Old TRIS Terms: Braking forces; Question d101; Starting forces
• Subject Areas: Materials; Railroads;

Filing Info

• Accession Number: 00052908
• Record Type: Publication
• Source Agency: International Union of Railways
• Report/Paper Numbers: D101/RP 1/E
• Files: TRIS
• Created Date: Apr 27 1977 12:00AM