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http://dx.doi.org/10.5050/KSNVE.2010.20.1.098

Analysis on the Squeal Noise of Wheel Brake System for Tilting Train  

Cha, Jung-Kwon (서울산업대학교 대학원 기계설계공학과)
Park, Yeong-Il (서울산업대학교 기계설계자동화공학부)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.20, no.1, 2010 , pp. 98-105 More about this Journal
Abstract
Squeal, a kind of self-excited vibration, is generated by the friction between the disc and the friction materials. It occurs at the ending stage of the braking process, and radiates and audible frequency range of 1 kHz to 10 kHz. Squeal is generated from unstability because of the coupling between the translation and rotation of the system. This instability is caused by the follower force and follower force is normal component of the friction force. In this paper modal analysis of wheel brake system was performed in order to predict the squeal phenomenon. It was shown that the prediction of system instability is possible by FEM. A finite element model of that brake system was made. Some parts of a real brake was selected and modeled. Modal analysis method performs analyses of each brake system component. Experimental modal analysis was performed for each brake components and experimental results were compared with analytical results from FEM. To predict the dynamic unstability of a whole system, the complex eigenvalue analysis for assembly modeling of components confirmed by modal analysis is performed. The finite element models of the disk brake assembly have been constructed, and the squeal noise problems have been solved by complex eigenvalue analysis. The complex eigenvalue analysis results compared with real train test.
Keywords
Wheel Brake; Squeal Noise; Modal Analysis; FEM; Complex Eigenvalue Analysis;
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  • Reference
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