The goal of this paper is to develop an accurate mathematical model of a gas-charged mono-tube racing damper based on the physics involved within the damper. in order to accomplish this, the first step is to understand the physics that govern damper behavior. With a preliminary understanding of the physics, it is then possible to identify those parameters that have the greatest influence on damper performance, which leads to a model focusing on those parameters. Once the model is then correlated to experimental data, the model can be exercised to gain even greater understanding of the relationship between damper design parameters and damper performance. The model includes bleed orifice, piston leakage, and shim stack flows. It also includes models of the floating piston and the stiffness characteristics of the shim stacks. The model is validated with experimental tests on an Ohlins WCJ 22/6 damper and shown to be accurate. The model is exercised to show the effects of tuning on damper performance. The important results of the exercise are 1) the pressure variation on the compression side of the piston is insignificant relative to that on the rebound side because of the gas charge, 2) valve shim stiffness can be successfully modelled using stacked thin circular plates, 3) bleed orifice settings dominate the low speed regime, and 4) shim stack stiffness dominates the high speed regime.
An experimentally validated physical model of a high-performance mono-tube damper
Eine experimentell bestätigtes physikalisches Modell eines hochleistungsfähigen Stoßdämpfers
2002
18 Seiten, 34 Bilder, 2 Tabellen, 16 Quellen
Conference paper
English
An Experimentally Validated Physical Model of a High-Performance Mono-Tube Damper
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