IMPROVEMENT OF THE RIDING STABILITY OF EXISTING RIV WAGONS REQUIRED TO RUN, UNDER ANY LOADING CONDITIONS, AT SPEEDS OF 80 KM/H. CRITERIA FOR ASSESSING THE SUITABILITY OF A TWO-AXLED WAGON TO RUN AT A MAXIMUM SPEED OF 80 KM/H. TEST PROCEDURE BASED ON THIS CRITERION

ORE Specialists Committee B 56 was entrusted with the work of developing a test procedure which should make it possible to assess, in a uniform manner, the running characteristics of wagons capable of running at 80 km/h under any loading conditions. This is the purpose of the present report. The introduction to the report deals with the origin of the question and sets forth, based on Enquiry Report B 56, the two fundamental methods of assessment. A description is moreover given of the reasons which have caused the Committee to prefer the test procedure based exclusively on safety as minimum requirement and to propose that the measurement of the running characteristics according to the method of the riding index W sub Z should only be used as extended test procedure. In accordance with the aforesaid, the first part of the Interim Report contains a description of the test procedure which is based on the principle of testing from the purely safety point of view. The procedure is based on the measurement of the accelerations at specified distances which are given by the radius of gyration from the centre of gravity. In the second part, the method of the riding index W sub Z is described, which has been made known by ORE Report B 37. This method consists in recording and evaluating oscillations to which the vehicle has been subjected. The accelerations are always measured on the platform above the trailing axle and at the end of a wagon. The limit values laid down for the wagon concerned are riding index W sub Z = 4.25 above the axle and riding index W sub Z = 4.5 at the end of the wagon.

• 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: 1965-2

Media Info

• Features: Appendices;
• Pagination: 15 p.

Subject/Index Terms

• TRT Terms: Derailments; Motor vehicles; Prevention; Ride quality; Safety; Stability (Mechanics); Test procedures; Tests; Train track dynamics; Two axle cars
• Old TRIS Terms: Question b56
• Subject Areas: Railroads; Safety and Human Factors; Security and Emergencies;

Filing Info

• Accession Number: 00052990
• Record Type: Publication
• Source Agency: International Union of Railways
• Report/Paper Numbers: B56/RP 1/E Intrm Rpt.
• Files: TRIS
• Created Date: Jul 8 1994 12:00AM