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A Study on the Brake Frictional Heat between Wheel Tread and Brake Shoe of E.M.U.'s  

Kim, Seong-Keol (School of Mechanical Design and Automation Engineering, Seoul National University of Technology)
Yoon, Cheon-Joo (Department of Rolling Stock System Engineering, Graduate School of Railroad, Seoul National University of Technology)
Goo, Byeong-Choon (Korea Railroad Research Institute)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.14, no.6, 2006 , pp. 95-103 More about this Journal
Abstract
Wheel treads of E.M.U. are usually under a heavy thermal load by brake frictional heat between wheel and brake shoe and damaged by repeated thermal and mechanical loads. To examine the cause of wheel tread damage of E.M.U.'s in service running, a systematic approach has been used. This study is composed of three parts. Frictional heat analysis was conducted in the first part by finite element method. Two kinds of brake shoes in service were considered. In the second part, experimental study was carried out on a brake dynamometer. Temperatures were measured for the two brake shoes. And experimental study in service running E.M.U.'s was performed. Wheel and brake shoe temperatures were measured by using thermocouples and temperature indicating strips. Finally metallurgical characteristics were examined by a SEM/EDS and the cause of the wheel damage was analyzed. It seems that aggregated ferrous component is a main cause of the wheel tread damage.
Keywords
Wheel tread; E.M.U.(Electrical Multiple Unit); Brake frictional heat; Wheel; Brake shoe; Wheel tread damage;
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  • Reference
1 B. J. Kwon, 'A Study on Stress Distribution of Korean High Speed Train Wheel at Tread Braking,' M. S. Thesis, Seoul National University of Technology, 2002
2 K. J. Choi, B. C. Goo, S. J. Kwon, S. W. Nam, D. H. Lee, W. S. Jung, D. H. Lee, W. H. Yoo, J. S. Nam, Y. G. Kim and K. H. Moon, 'A Study on the Development of Composite Brake Shoe for Power Car,' Korea Railroad Research Institute, 1999
3 K. J. Choi and D. H. LEE, 'Effect of the Brake Shoe on the Brake Force of the Freight Car,' Korea Railroad Research Institute, 2001
4 B. C. Goo, 'Fracture mechanics of railway axle, wheel, and rail,' Korea Railroad Research Institute, World Rail Trend, 2005
5 H. M. Lee, 'A Study on the Thermal Cracking Phenomenon of a Rolling Stock Brake Disc,' M. S. Thesis, Seoul National University of Technology, 2003
6 J. W. Seo and B. C. Goo, 'Thermal Stress Analysis of Drums Brakes by Finite Element Method,' Transactions of KSAE, Vol.9, No.3, pp.173-180, 2001
7 Brake Shoe Standard, Seoul Metropolitan Rapid Transit Corp., 2003