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Published on: September 28, 2015
Influence of Brake Pad Temperature Variation on the Squeal Noise Characteristics of Disc's In-Plane Vibration Mode
Sungyuk Kim1, Seongjoo Lee1, Shinwook Kim1
1Technical Center, KB Autosys Co., Ltd., Asan-si 31443, Republic of Korea.
Abstract:
This study investigated the squeal noise characteristics of the in-plane mode of the disc in a disc brake system as influenced by the temperature of the brake pad. The temperature range of the brake pad was set between 50 °C and 300 °C, and the squeal noise was analyzed by calculating the complex eigenvalues using the finite element method (FEM). The FEM analysis indicated that instability was most sensitive near 80 °C, and it was observed that instability exhibited mode exchange from the disc's in-plane mode to the out-of-plane mode in a nearby frequency band due to thermal deformation of the pad. A reproduction test was conducted using a brake dynamometer, where the main squeal noise was found to be approximately 10,000 Hz, consistent with the FEM analysis. Additionally, the squeal noise occurred most near 100 °C, and the noise disappeared after 250 °C. These results largely align with the FEM analysis model, validating the suitability of the analysis approach.
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