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Dynamic analysis for high-speed train hollow power axle

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Abstract

This study was carried out to find the forces acting on a Siemens Velaro D type high-speed train hollow power axle commissioned by Türkiye Cumhuriyeti Devlet Demiryolları (TCDD) to examine the dynamic loads created by these forces and to understand whether these shafts are safe in terms of continued strength. Track shift forces were found for the high-speed train, and according to these forces the net axle force ratio (L/V) was calculated depending on the speed increase. These data were compared with the experimental results of the Federal Railroad Administration (American FRA) and German Railways. In this study, after determining the compatibility of the calculated results with the experimental data, various analyses such as different road conditions, load on the axle for full vehicles, variation of vertical load, dynamic factor, safety factor and continuous strength calculation for the most dangerous section were carried out. Considering these analyses, while the static load is 148 kN in the vehicle loaded condition, this load increases to 153 kN in the vehicle loaded condition and at a speed of 70 m/s. For this reason, it would be wrong to use the static load created by the weight of the vehicle alone in the classical continuous strength calculation. The dynamic load created by the vehicle travel speed must be added to the calculations.

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Abbreviations

M :

Mass matrix

K :

Stiffness matrix

C :

Damping matrix

L :

Lateral force on a hollow axle

V :

Vertical force on a hollow axle

TCDD :

Türkiye cumhuriyeti devlet demiryolları

kN :

Kilo Newton

v :

Velocity

m/s :

Meters/second

ω :

Natural frequency

Ω :

Angular velocity

Km/h :

Kilometers/hours

R fL :

Fatigue limit unnotched surface test pieces

R fE :

Fatigue limit notched test piece

F 1 :

Fatigue limit on the body surface

F 2 :

Fatigue limit on the bore surface in the case of a hollow axle

R eh :

Yield strength

R m :

Rupture strenght

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Acknowledgments

The authors did not receive funding from any organization for this study.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Yildiz Technical University, Istanbul, 34349, Türkiye

    Umut Kınıt & Ferhat Dikmen

Authors
  1. Umut Kınıt
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  2. Ferhat Dikmen
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Corresponding author

Correspondence to Umut Kınıt.

Additional information

Umut Kinit is a Ph.D. student in Mechanical Engineering, Yildiz Technical University, İstanbul, Türkiye. He received the M.Sc. in Mechanical Engineering from İstanbul Technical University. His research interest includes mechanical design, technical drawing, rail systems, and machine elements.

Ferhat Dikmen completed his undergraduate education in 1980 at ITU Mechanical Faculty Aircraft Department. He completed his Master’s in Aeronautical Engineering at ITU Science Institute in 1982, and his Doctorate in Machine Construction at YTU Science Institute in 1989. He continues his career as a Professor in the Mechanical Engineering Department of YTU-Mechanical Faculty, where he started his career in 1981.

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Kınıt, U., Dikmen, F. Dynamic analysis for high-speed train hollow power axle. J Mech Sci Technol 37, 583–594 (2023). https://doi.org/10.1007/s12206-023-0104-7

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  • DOI: https://doi.org/10.1007/s12206-023-0104-7

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