Browse > Article
http://dx.doi.org/10.3795/KSME-A.2013.37.9.1099

Study on Weight Reduction of Urban Transit Carbody Based on Material Changes and Structural Optimization  

Cho, Jeong Gil (Dept. of Rolling Stock System, Seoul Nat'l Univ. of Science and Technology)
Koo, Jeong Seo (Dept. of Rolling Stock System, Seoul Nat'l Univ. of Science and Technology)
Jung, Hyun Seung (New Transportation Systems Research Center, Korea Railroad Research Institute)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.37, no.9, 2013 , pp. 1099-1107 More about this Journal
Abstract
This study proposes a weight reduction design for urban transit, specifically, a Korean EMU carbody made of aluminum extrusion profiles, according to size optimization and useful material changes. First, the thickness of the under-frame, side-panels, and end-panels were optimized by the size optimization process, and then, the weight of the Korean EMU carbody could be reduced to approximately 14.8%. Second, the under-frame of the optimized carbody was substituted with a frame-type structure made of SMA 570, and then, the weight of the hybrid-type carbody was 3.8% lighter than that of the initial K-EMU. Finally, the under-frame and the roof-panel were substituted with a composite material sandwich to obtain an ultralight hybrid-type carbody. The weight of the ultralight hybrid-type carbody was 30% lighter than that of the initial K-EMU. All the resulting carbody models satisfied the design regulations of the domestic Performance Test Standard for Electrical Multiple Unit.
Keywords
Weight Reduction; Urban Transit Carbody; Size Optimization; Frame type; Composite Materials;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
연도 인용수 순위
1 Kim, H. W., Kim, J. W., Jung, H. S. and Park, K. B., 2011, "A Study on Evaluating System Performance for Light-Weight Rolling Stock," The Korean Society for Railway, Vol. 14, No. 6, pp. 489-494.   과학기술학회마을   DOI   ScienceOn
2 Jang, H. J., Shin, K. B., Ko, H. Y. and Ko, T. H., 2010, "A Study on the Standardized Finite Element Models for Carbody Structures of Railway Vehicle Made of Sandwich Composites," The Korean Society for Railway, Vol. 13, No. 4, pp. 382-388.   과학기술학회마을
3 Tsai, S. W. and Wu, E. M., 1971, "General Theory of Strength for Anisotropic Materials," Journal of Composite Materials, Vol. 5, No. 1, pp. 58-80.   DOI
4 Jasbir S. Arora, 2004, Introduction to Optimum Design, Academic Press
5 http://tran.fiber-x.com/
6 Cho, J. G., Koo, J. S. and Jung, H. S., 2011, "A Study on Weight-reduction Design of a Hybrid Bodyshell Made by Substituting Underframe Material in a Box-type Carbody," The Korean Society of Automotive Engineers, Vol. 19, No. 5, pp. 100-112.   과학기술학회마을
7 Han, S. W. and Jung, H. S., 2010, "Weight Reducing of Aluminum Extrusion Profiles of a Railway-Car Body Based on Topology and Size Optimization," Trans. Korean Soc. Mech. Eng. A, Vol. 35, No. 2, pp. 213-221.   과학기술학회마을   DOI   ScienceOn
8 Kwon, T. S., Lee, H. Y., Lee, K. S. and Choi, S. K., 1998, "Bodyshell Strength Analysis for Standard EMU," The Korean Society for Railway Fall Conference, pp. 455-463.   과학기술학회마을
9 "Hypermesh," 2011, Altair Engineering Inc.
10 Korean Ministry of Construction and Transportation, 1998, "Performance Test Standard for Electrical Multiple Unit," Promulgation No. 22.
11 "Optimization," 2011, Altair Engineering Inc.
12 Choo, D. H., Kim, Y. M., Koo, B. C. and Koo, J. S., 2009, "A Study on Strcutual Strength Analysis and Load Test Evaluation of New Model EMU for Seoulmetro Line 3," The Korean Society for Railway Fall Conference, pp. 2034-2044.