The main characteristic of a gas damper (GD) is the use of gas as internal fluid, which offers an alternative to hydraulic shock absorbers. In this paper, a mathematical GD model is presented and validated. The use of a compressible fluid provides GD with a behaviour dependent on velocity,
like conventional dampers, but also with a strong dependency on frequency and on stroke amplitude. This dependency allows an improvement in the traditional compromise between comfort and safety. A quarter-car model is used to evaluate the ride performance that can be expected using the GD,
focusing on the cited compromise. Results are compared with the ride performance of a hydraulic shock absorber. Finally, a sensitivity study centred on the stiffness of the internal fluid is presented.
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off-road vehicle dynamics;
Document Type: Research Article
Automotive Laboratory, Applied Mechanics Department, Tecnun, University of Navarra, San Sebastian, Spain
CEIT and Tecnun, University of Navarra, San Sebastian, Spain
Construcciones y Auxiliar de Ferrocarriles S.A. and Tecnun, University of Navarra, San Sebastian, Spain
Publication date: 2011-01-01