Abstract
This study introduces an inverse rail profile design method for rails in the switch area of railway turnouts, which allows one to improve the wheel-rail contact and dynamic performance of rail vehicles during their passage of turnouts. Given the structure of rails in turnouts, this method employs the rolling radius difference function for the primary design basis, which is also the primary objective function. Using the expected distribution law between wheels and rails as a boundary condition, the Euler method is adopted to solve the differential equation for the rail ordinate under optimization based on given the transverse coordinates of rail. The robustness of the test is realized by optimizing the rail profiles for a representative set of wheel profiles. After the optimization, rail and wheel profiles are better matched, which improves the dynamic performance of rail vehicles crossing turnouts. This optimization method is quite efficient, and its results are reasonable.
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Abbreviations
- RRDF :
-
Rolling radius difference function
- RRF :
-
Rolling radius difference
- RCF :
-
Rolling contact fatigue
- CAF :
-
Contact angle function
- C :
-
Constant
- DAE :
-
Differential algebraic equation
- ODE :
-
Ordinary differential equation
- LM :
-
A Chinese wheel profile name
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Acknowledgments
This work is partly supported by the National Natural Science Foundation of China (No. 62103285: Research on an adaptive
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Dilai Chen is s a lecturer at the School of Railway Transportation, Shanghai Institute of Technology. He received his Ph.D. in Vehicle Engineering from Tongji University. His research interests include vehicle system dynamics and wheel-rail profile design.
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Chen, D., Sun, G., Xing, L. et al. A grinding profile design method for rails in the switch area considering a representative set of wheel profiles. J Mech Sci Technol 37, 4923–4933 (2023). https://doi.org/10.1007/s12206-023-0901-z
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DOI: https://doi.org/10.1007/s12206-023-0901-z