TRUCK BOLSTER DYNAMIC LOADING MEASURED UNDER HARMONIC ROLL CONDITIONS

In service, two general types of fatigue loading conditions are imposed on railroad freight-car truck bolsters. Both types of loading involve a relative rolling or rocking motion between truck and car body bolsters but differ in amplitude and frequency of the motion. One condition, the lateral harmonic roll motion action possible with large and high center of gravity freight cars, is associated with low train operating speeds and operation on track of periodic low joint conditions. This paper illustrates the truck-bolster dynamic loadings measured under the extreme harmonic roll condition on a specially prepared test track and describes the methods of instrumentation developed to measure such loadings.

• Supplemental Notes:
  • This paper was presented at the ASME Winter Annual Meeting, November 28-December 2, 1971. The notification of this paper appeared in Mechanical Engineering.
• Corporate Authors:

  American Society of Mechanical Engineers

  Two Park Avenue
  New York, NY  United States  10016-5990
• Authors:
  • Monselle, D
• Publication Date: 1971

Subject/Index Terms

• TRT Terms: Bolsters; Freight cars; Test tracks; Vehicle dynamics
• Old TRIS Terms: Rolling conditions; Truck and bolster systems
• Subject Areas: Railroads; Vehicles and Equipment;

Filing Info

• Accession Number: 00041674
• Record Type: Publication
• Source Agency: Mechanical Engineering
• Report/Paper Numbers: 71-WA/RT-6
• Files: TRIS
• Created Date: Jun 15 1976 12:00AM