Abstract
In this paper, to help reduce the squeal noise produced during the braking of urban railway vehicles, the shape of the disc brake pad was investigated to relieve contact stress. To analyze the disc brake system to identify the source of the squeal noise, a finite element model of the disc brake system was used, including the peripheral brake parts to increase accuracy. A complex eigenvalue analysis was performed to predict squeal noise generation. Verification was carried out using domestic urban railway field test results to confirm the accuracy of the analysis model. A pad shape that relieves contact stress is proposed to reduce squeal noise produced by nonuniform contact between the disc and pad. The results of this study can be utilized for future studies on squeal noise reduction.
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This work was financially supported by the Railroad Technology Research program (20RTRP-B123170-06) under the Korea Agency for Infrastructure Technology Advancement, Republic of Korea.
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Seoyeon Ahn completed the Ph.D. degree in Mechanical Engineering from Kyungpook National University. She is a researcher of the Korea Automotive Technology Institute and is responsible for the CAE analysis and technical development of chassis design.
Chanhyuk Nam completed the Ph.D. degree in Mechanical Engineering from Korea University. He is a Principal Researcher of vehicle-platform R&D center in Korea Automotive Technology Institute. His research interest is the vehicle dynamics and chassis design.
Sungjin Choi graduated the Ph.D. degree in Mechanical Engineering from Ajou University. He is a Vice President of Convergence Technology R&D Center in Korea Automotive Technology Institute. His research interest is the vehicle dynamics and chassis design.
Daekwon An received the M.S. degree in the Department of Engineering Technology, Mechanical Engineering Major Graduate School of Industry, Kyungpook National University. He is currently a Gen. Manager of R&D and OE Sales Team in SANGSIN BRAKE. His research interest is vehicle-component design and development.
In-ki Kim received his bachelor’s degree in electrical and electronic engineering at Kwangwoon University. He is currently one of the members of the Technical Research Department of the Korea Railroad Corporation (KORAIL) researchers and his research interests are field simulation and experimentation on reducing friction noise and disc aggression.
Kyoungsoo Seo is a Senior Researcher at the Railway Research Institute of Seoul Metro, Seoul, Korea. He received his Ph.D. in Business Administration from Hanyang University. His research interests include operations management, efficiency, and productivity on metro operations, maintenance, and management.
Chang Hyun Sohn received his M.Sc. and Ph.D. in Mechanical Engineering from KAIST in 1985, and 1991, respectively. He worked in ADD for 3 years. He also worked in University of Cambridge as a visiting Assistant Professor in 1996. He is currently a Professor at the Department of Mechanical Engineering at Kyungpook National University, Daegu, South Korea. His research interests include computational fluid dynamics, particle image velocimetry, flow induced vibration, Lattice Boltzmann method, parallel computation, and thermal hydraulics.
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Ahn, S., Nam, C., Choi, S. et al. A study on squeal noise reduction considering the pad shape of the disc brake system for urban railway vehicles. J Mech Sci Technol 35, 1923–1933 (2021). https://doi.org/10.1007/s12206-021-0410-x
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DOI: https://doi.org/10.1007/s12206-021-0410-x