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Many noise phenomena in braking systems are related to friction induced self-excitation. Classical excitation mechanisms are a negative velocity gradient of the coefficient of friction ("negative friction slope") or non-conservative couplings ("modal coupling"). For both mechanisms the influence of viscous damping has been extensively discussed in literature. However, in most engineering structures joint damping (microslip) is considered to be the dominant damping mechanism. This article deals with the influence of friction-like joint damping on the above-mentioned mechanisms for frictional self-excitation. In this context, rigid and compliant joint models are considered. The stability of steady states as well as corresponding basins of attraction are discussed.



Hetzler, Hartmut; - Institute of Engineering Mechanics (ITM), Karlsruhe Institute of Technology (KIT)

Friction Induced Vibrations Under The Influence Of Joint-damping

EB2013-MS-022 • Paper • EuroBrake 2013 • Modelling & Simulation (MS)

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