한국정밀공학회지 (Journal of the Korean Society for Precision Engineering)

한국정밀공학회 (Korean Society for Precision Engineering)
권호 표지

경량전철에 대한 차체 및 대차틀의 피로강도평가

Fatigue Strength Evaluation of Carbody and Bogie Frame for the Light Rail Transit System

  • 발행 : 2008.10.01
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

In terms of saving costs, energy and materials, the weight of cars has been gradually reduced by optimizing design of structure, which also gives us good performance. In compliance with this, it should satisfy the lifetime of cars for 25 years under the operation. The purpose of this study is to evaluate the strength of fatigue using date from strain gauges attached carbody and bogie frame. This dynamic stress can be evaluated using S-N curve based on stress amplitude. Modified S-N curve by CORTON-DOLAN is used for more conservative and substantial evaluation. In addition, !he loadings itself of carbody and bogie frame are considered by calculating the rate of the differences which are occurred between empty car and fuiiy occupied car with passengers. Rainflow cycle counting method is applied to arrange the stress data for the modified S-N curve to predict lifetime of the materials. Conclusively the cumulative damages are not only calculated by Miner's Rule, but the safety factors are also determined by Goodman diagram.

키워드

참고문헌

  1. Lee, H. Y., Hong, J. S., Jung, J. D. and Lee, K. S., "Carbody basic design for rubber tired AGT," Transaction of the KSR, Vol. 3, No. 3, pp. 161-169, 2000
  2. Han, S. H., Han, J. W. and Shin, B. C., "Static and fatigue strength estimation of bogie frame for light railway vehicle," Spring Conference Proceedings of the KSME(A), Vol. 1, No. 1, pp. 987-992, 1999
  3. Park, K. J., Lee, H. Y., Lee, K. S. and Kim, W. K.,'Fatigue strength evaluation of a bogie frame for standard electric multiple unit(I)," Transaction of the KSR, Vol. 3, No. 3, pp. 170-177, 2000
  4. Seo, J. W., Goo, B. C., Kim, N. P., You, W. H. and Chung, H. C., "Probabilistic estimation of the fatigue strength of an electric car bogie frame," Autumn Conference Proceedings of the KSR, Vol. 1, pp. 261-266, 2001
  5. LPRS, "Development of Light Rail Transit System," Report of LRT System, Korea Railroad Research Institute & WooJin Co., Ltd., No. 1, pp. 35-55, 2002
  6. LPSE, "Structural Analysis and Static Test of Light Rail Transit System," Review of LRT System, Korea Railroad Research Institute, No. 1, pp. 1-42, 2007
  7. JSME, Japanese Industrial Standards E 4207, "Truck frames for railway rolling stock (General rules for design)," pp. 1-35, 2004
  8. Bannantine, J. A., Comer and J. J. and Handrock, J. L., "Fundamentals of Metal Fatigue Analysis," Prentice Hall, pp. 18-40, 2000
  9. Singh, A., "the nature of initiation and propagation S-N curves at and below the fatigue limit," Fatigue Fracture Engineering and Material Structure, Vol. 25, No. 2, pp. 79-89, 2002 https://doi.org/10.1046/j.1460-2695.2002.00463.x
  10. Miner, M. A., "Cumulative damage in fatigue," Journal of Applied Mechanics, Trans, ASME, Vol. 12, No. 3, pp. 159-164, 1945
  11. Lee, J. H., Kim, J. M., Choi, Y. J., Lee, E. C., Lee, J. S., Lee, H. Y. and Seo, M. Y., "Experimental Research for Fatigue Strength Estimation of Light Rail Transit System," Proc. of KSPE Spring Conference, pp. 147-151, 2007