Journal of Applied Mechanical Engineering

Comparison between complex Eigen value and modes pairs of two-piece disc brake in squeal prediction

4^th International Conference and Exhibition on Mechanical & Aerospace Engineering

October 03-04, 2016 Orlando, USA

Taeksu Jung and Chongdu Cho

Inha University, South Korea

Posters & Accepted Abstracts: J Appl Mech Eng

Abstract:

Automotive brake noise and vibration is considered as a stubborn problem over the past few decades, and it has become a major source of customer complaint. Many of methodologies for understanding the noises have been suggested, however, it is not clearly investigated, since various reasons with complicated mechanism can induce the noises. However, the squeal, one typical type of brake noise, was unveiled a phenomenon caused by dynamic instability, so it can be defined as a type of elastic instability that includes elastic modes within the audible frequencies of brake components. Analytical approaches for predicting squeal are generally adopting finite element methods. The complex Eigen value method as conventional way to predict squeal is coming from the slipstick phenomenon on the interface, which is inducing unsymmetrical part on the stiffness matrix by friction. The newer tendencies in research for squeal are focusing on the relationship between the in-plane and the out-of-plane modes of a disc rotor, which can be influenced to the squeal by the coupling of in-plane circular vibration and out-of-plane diametric vibration. However, the comparison between mentioned methods was not clearly studied, and limited to the traditional one-piece rotor. In this study, the two-piece rotor, which is known as performance brake and will suffer tough operating condition, is FE modeled and analyzed by two different methods â?? complex Eigen value calculation and modal superposition inspection â?? and correlated with noise test and modal test result of manufactured brake. And comparison to find relationship is carried out for the correlated analysis result.

Biography :

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