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Main Title: Theoretical and experimental investigations of the bifurcation behavior of creep groan of automotive disk brakes
Author(s): Zhao, Xingwei
Gräbner, Nils
Wagner, Utz von
Type: Article
Language Code: en
Abstract: There are several low frequency vibration phenomena which can be observed in automotive disk brakes. Creep groan is one of them provoking noise and structural vibrations of the car. In contrast to other vibration phenomena like brake squeal, creep groan is caused by the stick-slip-effect. A fundamental investigation of creep groan is proposed in this paper theoretically and experimentally with respect to parameter regions of the occurrence. Creep groan limit cycles are observed while performing experiments in a test rig with an idealized brake. A nonlinear model using the bristle friction law is set up in order to simulate the limit cycle of creep groan. As a result, the system shows three regions of qualitatively different behavior depending on the brake pressure and driving speed, i.e. a region with a stable equilibrium solution and a stable limit cycle, a region with only a stable equilibrium solution, and a region with only a stable limit cycle. The limit cycle can be interpreted as creep groan while the equilibrium solution is the desired vibration-free case. These three regions and the bifurcation behavior are demonstrated by the corresponding map. The experimental results are analyzed and compared with the simulation results showing good agreement. The bifurcation behavior and the corresponding map with three different regions are also confirmed by the experimental results. At the end, a similar map with the three regions is also measured at a test rig with a complete real brake.
Issue Date: 2018
Date Available: 26-Jun-2018
DDC Class: 620 Ingenieurwissenschaften und zugeordnete Tätigkeiten
530 Physik
Subject(s): creep groan
stick-slip limit cycle
equilibrium solution
Journal Title: Journal of theoretical and applied mechanics
Publisher: Polish Society of Theoretical and Applied Mechanics
Publisher Place: Warsaw
Volume: 56
Issue: 2
Publisher DOI: 10.15632/jtam-pl.56.2.351
Page Start: 351
Page End: 364
EISSN: 2543-6309
ISSN: 1429-2955
Appears in Collections:FG Mechatronische Maschinendynamik » Publications

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