Calculation of Resistance to Motion of a High-Speed Train Using Acceleration Measurements in Irregular Coasting Conditions

This article presents a study on the resistance to motion of the Korean high-speed train with calculations that have been evaluated using train speed measurements gathered from coasting tests. The speed range of these tests is from 30 to 300 km/h for a seven-car configuration, conducted under various track conditions. Several test runs of the Korean high-speed train have been performed on the Seoul-Busan high-speed line since August 2002. In this study, the authors have employed a modified method for regression and the normal regression method to calculate the running resistance of the train. This method is designed to eliminate errors due to the irregular test conditions of slope, train speed, and coasting distance. The authors also include an expanded discussion on the validity and robustness of the calculation methods. Based on the general resistance to motion equation for the Train à Grande Vittesse, initial estimates of resistance to motion for the Korean high-speed train are compared with measurements from the coasting test. Curve fits of the acceleration data using a second-order polynomial show that low-speed region error is relatively high. However, the authors note that fixing the constant and low-order coefficients can generate more robust curve-fitting results. The authors conclude that based on the resistance to motion equation for the Korea Train Express train, especially in the high-speed region, the Korean high-speed train has a lower actual resistance to motion than the estimated value.

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  • Authors:
    • Kim, S-W
    • Kwon, H-B
    • Kim, Y-G
    • Park, T-W
  • Publication Date: 2006-12

Language

  • English

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Filing Info

  • Accession Number: 01046506
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Apr 1 2007 5:58PM