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Volume 25
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10.3390/s25134080
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This is an early access version, the complete PDF, HTML, and XML versions will be available soon.
Article

Influence of Brake Pad Temperature Variation on the Squeal Noise Characteristics of Disc’s In-Plane Vibration Mode

by
Sungyuk Kim
1,
Seongjoo Lee
1,
Shinwook Kim
1 and
Jaehyeon Nam
2,*
1
Technical Center, KB Autosys Co., Ltd., Asan-si 31443, Republic of Korea
2
Mechanical Convergence System Center, Institute for Advanced Engineering, Youngin-si 17180, Republic of Korea
*
Author to whom correspondence should be addressed.
Sensors 2025, 25(13), 4080; https://doi.org/10.3390/s25134080
Submission received: 30 April 2025 / Revised: 23 June 2025 / Accepted: 23 June 2025 / Published: 30 June 2025
(This article belongs to the Special Issue Robust Measurement and Control Under Noise and Vibrations)
Versions Notes

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.
Keywords: mode coupling; squeal noise; in-plane mode; thermal expansion; brake dynamometer mode coupling; squeal noise; in-plane mode; thermal expansion; brake dynamometer

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MDPI and ACS Style

Kim, S.; Lee, S.; Kim, S.; Nam, J. Influence of Brake Pad Temperature Variation on the Squeal Noise Characteristics of Disc’s In-Plane Vibration Mode. Sensors 2025, 25, 4080. https://doi.org/10.3390/s25134080

AMA Style

Kim S, Lee S, Kim S, Nam J. Influence of Brake Pad Temperature Variation on the Squeal Noise Characteristics of Disc’s In-Plane Vibration Mode. Sensors. 2025; 25(13):4080. https://doi.org/10.3390/s25134080

Chicago/Turabian Style

Kim, Sungyuk, Seongjoo Lee, Shinwook Kim, and Jaehyeon Nam. 2025. "Influence of Brake Pad Temperature Variation on the Squeal Noise Characteristics of Disc’s In-Plane Vibration Mode" Sensors 25, no. 13: 4080. https://doi.org/10.3390/s25134080

APA Style

Kim, S., Lee, S., Kim, S., & Nam, J. (2025). Influence of Brake Pad Temperature Variation on the Squeal Noise Characteristics of Disc’s In-Plane Vibration Mode. Sensors, 25(13), 4080. https://doi.org/10.3390/s25134080

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