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Many basic studies were conducted to discover the main reason for squeal occurrence in both disc and drum brake systems. As, it is well-known that the squealed brake system is more effective than the non-squealed brake system and it is also a common discomfort. So, cancellation of the squeal is not preferable, however, elimination of the brake squeal is a favorable. An approach to study the drum brake squeal is presented based mainly on the Finite Element Method (FEM) representation. The brake system model is based also on the model information extracted from finite element models for individual brake components. This finite element method (FEM) was used to predict the mode shape and natural frequency of the brake system after appropriate verification of FEM.

Brake squeal is one of the most common problems in automobile industry that results in significant warranty cost. To reduce warranty cost due to brake squeal and provide guidance for brake design, it is important to understand the contributions of key brake design parameters for brake noise. This type of noise occurs when a brake system experiences large amplitude mechanical vibration and is audible in 1,000 to 15,000 Hz frequency range. In this paper, an approach to study the drum brake squeal based on finite elements method (FEM) is proposed that can be used as a design tool for improving the quality of the brake system. The finite element model used in the analysis consists of several major components; drum, shoes, lining (trailing and leading)…etc. The full finite element model was used to predict the brake system natural frequency and associated mode shape.