Various hydraulic shock-absorbing devices have been limiting value of lading acceleration criterion and shows the amount of damage to lading caused by excessive end to end impact. Since their use is to limit the force that acts on the lading, it would seem that a reasonable approach to use in designing a cushioning gear is to first select a limiting value of force or acceleration the lading can tolerate, and then design the gear so that this value is not exceeded during impact. This paper discusses the design of an air-oil cushioning gear for rail car applications using a how to design the metering pin and orifice, contained in the device, to control the acceleration of the lading for a particular impact condition. A numerical example is given showing how to determine the length and contour of the metering pin for a given set of boundary conditions. Presented at the end of the paper is a brief discussion on the experimental techniques used in determing the actual performance of the cushioning gear.

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  • Supplemental Notes:
    • This paper appeared in Anthology of Rail Vehicle Dynamics, Volume 1: Freight Car Impact. The anthology was sponsored by the Rail Transportation Division, ASME. Presented at the Winter Annual Meeting, New York, N.Y., Nov. 26-Dec. 1, 1961.
  • Corporate Authors:

    American Society of Mechanical Engineers

    Two Park Avenue
    New York, NY  United States  10016-5990
  • Authors:
    • Hassenauer, R L
    • Novak, G E
  • Publication Date: 1971

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Filing Info

  • Accession Number: 00047442
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Nov 14 1974 12:00AM