Stochastic Sensitivity of External Impact Factors on the Straight-Line Performance of a Generic Motorbike

Christoph Feichtinger, Peter Fischer

Publikation: Beitrag in Buch/Bericht/KonferenzbandBeitrag in einem KonferenzbandForschungBegutachtung

Abstract

Creep Groan is an impulsive brake noise at creep velocities of the vehicle. Stick-slip between brake disc and brake pads is an important trigger of creep groan. Flexibili-ties in the axle bushings, elastic deformations of suspension parts and the wheel movements facilitate the nonlinear, periodic signature of creep groan vibrations.
Frequently, creep groan occurs around 15 - 20 Hz and 70 - 90 Hz. The mechanism at 15 - 20 Hz is classical stick-slip. At 70 - 90 Hz, the vibrations are typically in a tran-sition between stick-slip and rotational vibrations without sticking, i.e. at relative speeds between disc and pads in the same direction. In practical vehicle operation, the range of 70 - 90 Hz is the most relevant one.
The simulation by complex modal analysis (CEA), which is a well-established tool for squeal analysis, requires extensive linearisations. These appear not suitable for creep groan phenomena involving distinctive stick phases. For dynamic response analysis in time domain, both implicit and explicit computation methods can be used. However, for larger Finite Element models above some thousand elements, the explicit solution scheme shows clear advantages in terms of computation times and in view of a straightforward procedure for industrial application.
Originalspracheenglisch
TitelAdvances in Dynamics of Vehicles on Roads and Tracks
Herausgeber (Verlag)Springer Nature Switrzerland AG
Seitenumfang8
PublikationsstatusAngenommen/In Druck - 2019
VeranstaltungSymposium of International Association for Vehicle System Dynamics - Gothenburg, Schweden
Dauer: 12 Aug 201916 Aug 2019

Konferenz

KonferenzSymposium of International Association for Vehicle System Dynamics
KurztitelIAVSD
LandSchweden
OrtGothenburg
Zeitraum12/08/1916/08/19

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Fields of Expertise

  • Mobility & Production

Dieses zitieren

Feichtinger, C., & Fischer, P. (Angenommen/Im Druck). Stochastic Sensitivity of External Impact Factors on the Straight-Line Performance of a Generic Motorbike. in Advances in Dynamics of Vehicles on Roads and Tracks Springer Nature Switrzerland AG.