Journal
NONLINEAR DYNAMICS
Volume 67, Issue 2, Pages 1437-1456Publisher
SPRINGER
DOI: 10.1007/s11071-011-0079-2
Keywords
Shock absorber; Nonlinear damper model; Hydraulic damper design tool; Variational and energy method; Rayleigh-Ritz; Lagrange multipliers
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A nonlinear model of monotube hydraulic dampers is presented with an emphasis on the shim stack properties and their effects on the overall damper performance. There has been no published detailed analysis of the effects of shim stack design in a hydraulic damper to date. Other damper models have used simplifying assumptions for the shim stack deflection and effects of the shim stack have not been completely studied. Various parameters affecting the nonlinear characteristics of monotube dampers such as the hysteresis region are studied. The model presented in this paper can be used for design purposes and helps in developing controllable valvings based on shim stacks. It can also be used to design controllable bypasses in hydraulic dampers. The mathematical model is validated by comparison against experimental test results carried out on an OHLINS CCJ 23/8 monotube damper, in CVeSS test facilities.
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