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Semi-analytical approch for brake squeal of a rail pad

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Abstract

In this study, a semi-analytical pad model was developed to analyze the causes and mechanism of brake squeal of a rail pad in a railway brake system. A complex eigenvalue analysis was performed by developing the equation of motion of the contact area using a semi-analytical model. As a result, dynamic instability was indicated by the mode-merging of the z-translation mode and flexible mode of the rail pad. In addition, the z-translation mode of the rail pad has a large frequency change when increasing the contact stiffness, and mode-veering is generated by the surrounding flexible mode along the frequency loci. Therefore, z-translation mode is predicted to be major mode that generates the mode-coupling instability.

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Authors and Affiliations

  1. School of Mechanical Engineering, Inha University, Incheon, 22212, Korea

    Jaehyeon Nam & Jaeyoung Kang

Authors
  1. Jaehyeon Nam
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  2. Jaeyoung Kang
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Correspondence to Jaeyoung Kang.

Additional information

Recommended by Editor No-cheol Park

Jaeyoung Kang is a Professor in the Department of Mechanical Engineering, Inha University. He received his Ph.D. degree in Mechanical Engineering from Purdue University in 2008. His research interests include friction noise, structural vibration and nonlinear dynamics.

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Nam, J., Kang, J. Semi-analytical approch for brake squeal of a rail pad. J Mech Sci Technol 34, 3147–3153 (2020). https://doi.org/10.1007/s12206-020-0706-2

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  • DOI: https://doi.org/10.1007/s12206-020-0706-2

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