00474277

Component

http://onlinepubs.trb.org...trr/1986/1071/1071-002.pdf

https://scholar.google.co...tock&publication_year=1986

Summarized in this paper are recent government-sponsored studies to determine the effectiveness of various methods for reducing wheel/rail curving forces and resulting wear and component failure on U.S. transit properties. It describes the factors affecting the trade-off between curving performance and truck stability as it affects ride quality and the potential for derailment. A simplified description of truck-curving mechanics is presented, outlining three sources of lateral wheel/rail forces and three key methods for reducing those forces. References to more detailed papers and reports are included. Finally, the results of wheel/rail force measurements made for various truck and track configurations are presented and compared with theory. It is concluded that reductions in curving forces of up to 75 percent can be obtained by using tapered wheels and softening the longitudinal primary suspension or incorporating steerable trucks, or both.

Publication of this paper sponsored by Task Force on Rail Transit System Design. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved

01418783

pp 6-15

1986

Transportation Research Record

0309040655

Print

Figures (19) ; References (9) ; Tables (2)

Alternatives analysis; Car trucks (Railroads); Curved track; Derailments; Measures of effectiveness; Railroad rails; Railroad transportation; Reduction (Chemistry); Ride quality; Rolling contact; Steering; Wheels

Effectiveness

Design; Highways; Public Transportation; Railroads; Vehicles and Equipment

TRIS, TRB

Oct 31 1988 12:00AM

• AN ASSESSMENT OF DESIGN CRITERIA FOR CONTINUOUS-WELDED RAIL ON ELEVATED TRANSIT STRUCTURES
• BASIC FRENCH TECHNOLOGY FOR CROSSINGS, SWITCHES, AND SPECIAL TRACKWORK
• CONTINUOUS-WELDED RAIL ON BART AERIAL STRUCTURES
• DEVELOPMENT WORK ON SWITCHES AND CROSSINGS BY BRITISH RAIL
• EVOLUTION OF THE RAIL-BOUND MANGANESE FROG
• IN-TRACK PERFORMANCE OF GEOTEXTILES AT CALDWELL, TEXAS
• INSTALLATION FACTORS THAT AFFECT PERFORMANCE OF RAILROAD GEOTEXTILES
• MANGANESE STEEL CASTINGS: NEW TECHNOLOGY FOR WELDING FROGS TO RAIL
• MANUFACTURING, RECLAMATION AND EXPLOSIVE DEPTH HARDENING OF RAIL-BOUND AND SELF-GUARDED MANGANESE FROGS ON THE CHESSIE SYSTEM
• PROCUREMENT AND SELECTION OF DIRECT FIXATION FASTENERS FOR TRANSIT PROJECTS
• RAIL CORRUGATION--EXPERIENCE OF U.S. TRANSIT PROPERTIES
• SEGMENTAL AERIAL STRUCTURES FOR ATLANTA'S RAIL TRANSIT SYSTEM