Analysis of Brake Squeal Noise using FEM Part I: Determination of Contact Stiffness between Rotor and Pads

Format:

Conference/Event

Author/Creator:

Júnior, Mário Trichês, author.

Conference Name:

2004 SAE Brasil Congress and Exhibit (2004-11-16 : Sao Paulo, Brazil)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2004

Summary:

Brake squeal is a problem that has been faced by several methods in the last decade. Among then, finite element analysis is proving to be a useful tool to predict the noise occurrence of a particular brake system during the design stage. The Finite Element Method (FEM) has been employed to detect unstable frequencies using a complex eigenvalue analysis. These unstable frequencies are related, in most cases, with high sound pressure levels generated during the brake system operation and its detection is an important step in order to produce quiet brake systems. Although the method is fast and provides guidance for solving engineering problems, it is very sensitive to input parameters like material properties and boundary conditions. For brake system modeling, the determination of the contact stiffness between rotor and pads is a crucial point, since one of the major contributing mechanisms to generate squealing frequencies is the modal coupling between these two components. The scope of this paper is to evaluate different methods to obtain the contact stiffness on the rotor-pad interface. Static and dynamic based methods are tested and the results obtained are experimentally validated by a power flow analysis. Moreover, a procedure to estimate the effect of braking pressure on the contact stiffness is showed

Notes:

Vendor supplied data

Publisher Number:

2004-01-3330

Access Restriction:

Restricted for use by site license