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Advanced Representative Rail Temperature Measurement Point Considering Rail Deformation by Meteorological Conditions and Rail Orientation

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Abstract

Rail temperature is the main effector of train operation. High rail temperature induces rail deformation and because of limited space for rail deformation, rails are under compressive pressure. When rail deformation is exceeded, rail buckling occurs, and this causes rail derailment. Although such a rail derailment is infrequent, the casualties of human lives and properties are catastrophic. To prevent this, the rail industry has been monitoring rail temperature. However, existing representative rail temperature measurement points (RMPs) are selected without considering thermal deformation, and there is no sufficient information for selecting RMPs. In this study, we suggest a novel advanced RMP (ARMP) considering rail installation orientation and meteorological conditions. We designed a measurement system for rail temperature and obtained 1-year data of rail temperature at multiple internal, external rail points and the surrounding environments. We validated our measured data with field data similar to the climate in which the measurement system was installed. The maximum error and Mean Absolute Error (MAE) were 3.3 °C and 0.97 °C respectively. We calculated average deformation points (ADPs) and analyzed them with respect to the energy that the rail receives from the meteorological conditions, which are represented by the cumulative amount of solar irradiance and installation orientation. Based on the tendency of ADPs, we suggested a simple equation of ARMP with only one variable, month. ARMP showed high accuracy in measuring rail temperature at two installation orientations than previous RMPs (R-square: 0.9255, 0.8577 and MAE: 0.21 °C, 0.33 °C). We expect that this study would contribute to efficient train operation for the precise measurement of rail temperature.

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Acknowledgements

This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (No. 2021R1I1A3055744 and No. 2021R1A4A1032762).

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Authors and Affiliations

  1. Department of Mechanical Engineering, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon, 34134, Republic of Korea

    Cheoljeong Park, Jongwon Yoon, Sunguk Hong, Chan Park, Yeondo Jeong, Jungmin Kim, Byeongjun Lee, Haran Lee, Chiwon Song & Seong J. Cho

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  1. Cheoljeong Park
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  2. Jongwon Yoon
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  3. Sunguk Hong
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  4. Chan Park
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Correspondence to Seong J. Cho.

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: Details of measurement points of rail temperature and its analysis

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Park, C., Yoon, J., Hong, S. et al. Advanced Representative Rail Temperature Measurement Point Considering Rail Deformation by Meteorological Conditions and Rail Orientation. Int. J. Precis. Eng. Manuf. 24, 239–249 (2023). https://doi.org/10.1007/s12541-022-00747-7

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