1. Jasna Glišović, Fakultet inženjerskih nauka Univerziteta u Kragujevcu, Serbia
2. Jovanka Lukic, Fakultet inženjerskih nauka Univerziteta u Kragujevcu, Serbia
3. Danijela Miloradović, Faculty of Engineering, University of Kragujevac, Sestre Janjić 6, 34000 Kragujevac, Srbija 2IMW Ins, Serbia
Automobile disc brakes were intensively developed over recent decades, but at the same time the engine power, average vehicle speed, and hence the kinetic energy to be transformed into the brake, were significantly increased, too. A small part of the kinetic energy is transformed into sound energy and creates noise. Disc brake noise is a problem which has preoccupied manufacturers. User\'s complaints lead to significant annual warranty costs. More importantly, user dissatisfaction can lead to losses in future business operations. The squealing brake is difficult and expensive to repair. It is better to solve the noise problem during design phase. In this manner, good understanding of the brake noise mechanism has become an important factor in the competition in the construction of successful braking systems. Occurrence of instability is mainly explained by one of three basic ways, namely, by changing of the friction characteristics with the vehicle speed, changing the relative orientation of the disk and the friction lining and thus modify the friction force, which leads to divergence instability, and the pulsating type of instability even with the constant coefficient of friction. This paper presents a disc brake model using the finite element method for the numerical study of the squeal phenomenon and is verified by experimental measurements. The effect of the main operational parameters (braking pressure, and friction coefficient) on the squeal propensity is performed.
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Datum:
15.02.2013.
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