Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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Fatigue Life Evaluation of Motor Block Bracket Units for KTX-Sancheon Trains

KTX-산천 열차용 모터 감속기 고정대의 피로 수명 평가

  • Lee, Chan-Woo (High-Speed Railroad Systems Research Center, Korea Railroad Research Institute) ;
  • Lee, Dong-Hyong (High-Speed Railroad Systems Research Center, Korea Railroad Research Institute)
  • 이찬우 (한국철도기술연구원 고속철도연구본부) ;
  • 이동형 (한국철도기술연구원 고속철도연구본부)
  • Received : 2012.04.13
  • Accepted : 2012.04.27
  • Published : 2012.06.01
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Abstract

In this study, fatigue life of the motor block bracket units for KTX-Sancheon trains was assessed. Design evaluation for railway structures was performed based on the UIC 566 regulation, and test and evaluation of fatigue life in welded parts was performed in accordance with standard ERRI B 12/RP17 and ERRI B 12/RP60. The actual vehicle dynamic stress testing was executed in KTX-Sancheon service line with the service operating speed. The dynamic stress was measured with commercial data acquisition system (MGC plus). The cumulative damage was evaluated by applying standard BS 7608 - Class F and cycle counting was used rain-flow counting method. As a result, the motor block bracket units for KTX-Sancheon trains was designed to fit the regulation and the safety of fatigue life for 30 years, assuming that KTX-Sancheon trains travels 600,000km annually, were confirmed under current operating conditions.

Keywords

References

  1. Jun, H. K., Seo, J. W., Lee, D. H., and Kim, H. J., "A Study on the Fatigue Crack Evaluation Method of Railway Bogie Frame," Journal of the Society for Railway, Vol. 14, No. 6, pp. 16-24, 2009.
  2. Jun, H. K., Seo, J. W., Lee, D. H., and Kim, H. J., "A Study on the Fatigue Crack Evaluation Method of EMU Bogie Frame," Proc. of KSPE Spring Conference, pp. 983-984, 2008.
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  5. UIC 566, "Loadings of coach bodies and their components," 2012.
  6. ERRI Report B 12/RP17, "Programme of tests to be carried out on wagons with steel underframe and body structure and on their cast steel frame bogies," 1997.
  7. ERRI B 12/RP 60-2nd, "Tests to demonstrate the strength of railway vehicles," 2001.
  8. BS 7608, "Fatigue design and assessment of steel structures," 1993.

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