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Analysis of Low-Frequency Squeal in Automotive Disc Brake by Optimizing Groove and Caliper Shapes

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Abstract

A low-frequency squeal that occurs due to the coupling phenomena of various vibrational modes in a disc brake system may cause annoyance to passengers. In an effort to remove the irritating low-frequency squeal of the disc brake, we carried out complex eigenvalue analysis and investigated the contribution ratio of each part to the occurrence of squealing. To this end, we developed a reliable and accurate finite element (FE) model of each brake part and compared it to the model test results. Throughout the complex eigenvalue analysis for the FE models, all unstable modes and corresponding frequencies in the brake system were calculated. The dominant parts that contributed largely to the squealing of the brake system were also elicited by the component contribution factor (CCF) analysis. Parts such as the disc, carrier, pad, and knuckle, were determined as large contributors to squealing. To reduce squealing, the tie-bar shape and the groove shape around the disc hub were optimized by FE-based shape optimization. A new disc with an optimal groove and a new tie-bar were manufactured, and dynamo squeal tests were conducted for a comparison to the numerical prediction. A fairly good correlation was observed between the experimental and numerical analysis results.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Kyungpook National University, 80, Daehak-ro, Buk-gu, Daegu, 41566, Republic of Korea

    Cheol Kim & Yonghwan Kwon

  2. Research & Development Division, Hyundai Motor, 150 Hyundaiyeonguso-Ro, Hwaseong-Si, Gyeonggi-Do, 18280, Republic of Korea

    Dongwon Kim

Authors
  1. Cheol Kim
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  2. Yonghwan Kwon
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Correspondence to Cheol Kim.

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Kim, C., Kwon, Y. & Kim, D. Analysis of Low-Frequency Squeal in Automotive Disc Brake by Optimizing Groove and Caliper Shapes. Int. J. Precis. Eng. Manuf. 19, 505–512 (2018). https://doi.org/10.1007/s12541-018-0061-8

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  • DOI: https://doi.org/10.1007/s12541-018-0061-8

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