Optimizing Railroad Freight Car Truck Suspension Systems Having Coulomb Damping

[+] Author and Article Information
R. L. Bullock

Standard Car Truck Company, Chicago, Ill.

D. B. Cooley

Railroad System Dynamics, Inc., Irvington, N. J.

J. Eng. Ind 100(3), 311-316 (Aug 01, 1978) (6 pages) doi:10.1115/1.3439429 History: Received August 01, 1977; Online July 15, 2010


This paper describes the design process followed in developing a 100 ton freight car truck suspension system having coulomb damping. Classical linear vibration analysis was used for the conceptual design phase. Within the constraints placed upon truck suspension systems, a constant damping parameter, i.e., the ratio of friction force to static force imparted by the base, for all load conditions was established as a design goal. Optimization of the actual design parameters and comparison to existing truck suspensions was accomplished using the latest vehicle model developed by the AAR/TTD.

Copyright © 1978 by ASME
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