Determination of temperature stresses in CWR based on measured rail surface temperatures
Само за регистроване кориснике
2021
Аутори
Mirković, NikolaBrajović, Ljiljana
Popović, Zdenka
Todorović, Goran
Lazarević, Luka
Petrović, Miloš
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
The main aim of conducted research is determination of temperature stresses due to the uneven temperature distribution in CWR. This paper presents a methodology for determination of temperature stresses in CWR based on (1) measurement system developed by the authors for measurement of rail surface temperatures, and (2) coupled transient thermal-stress analysis for simulation of rail temperature field and corresponding stresses. The main advantages of the proposed methodology are high sensitivity to the small temperature variations, taking into account the effect of thermal inertia, as well as measurement of single input parameter rail surface temperature. The obtained experimental results showed lower rail temperatures in sleeper zones and rail foot along CWR, which emphasize the effect of heat transfer between rail and sleeper, as well as rail foot and ballast. These effects of heat transfer directly influence the decrease of temperature stresses in the mentioned zones of CWR. The max...imum values of simulated temperature stresses are up to 16% less in the centre of gravity of railhead, up to 9.8% less in the centre of gravity of rail foot, and up to 0.2% less in the centre of gravity of rail web, compared to the common engineering calculation. In addition, the maximum value of simulated temperature force, based on temperature stresses in the rail cross-section, was up to 5.3% less than the value obtained in the common engineering calculation.
Кључне речи:
Railway / Continuously welded rail / Temperature measurement system / Thermal-stress analysis / Temperature distribution / Temperature stress / Temperature force / Temperature strainИзвор:
Construction and Building Materials, 2021, 284Финансирање / пројекти:
- Истраживање техничко-технолошке, кадровске и организационе оспособљености Железница Србије са аспекта садашњих и будућих захтева Европске Уније (RS-MESTD-Technological Development (TD or TR)-36012)
DOI: 10.1016/j.conbuildmat.2021.122713
ISSN: 0950-0618
WoS: 000647465700001
Scopus: 2-s2.0-85102064373
Институција/група
Tehnološko-metalurški fakultetTY - JOUR AU - Mirković, Nikola AU - Brajović, Ljiljana AU - Popović, Zdenka AU - Todorović, Goran AU - Lazarević, Luka AU - Petrović, Miloš PY - 2021 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4908 AB - The main aim of conducted research is determination of temperature stresses due to the uneven temperature distribution in CWR. This paper presents a methodology for determination of temperature stresses in CWR based on (1) measurement system developed by the authors for measurement of rail surface temperatures, and (2) coupled transient thermal-stress analysis for simulation of rail temperature field and corresponding stresses. The main advantages of the proposed methodology are high sensitivity to the small temperature variations, taking into account the effect of thermal inertia, as well as measurement of single input parameter rail surface temperature. The obtained experimental results showed lower rail temperatures in sleeper zones and rail foot along CWR, which emphasize the effect of heat transfer between rail and sleeper, as well as rail foot and ballast. These effects of heat transfer directly influence the decrease of temperature stresses in the mentioned zones of CWR. The maximum values of simulated temperature stresses are up to 16% less in the centre of gravity of railhead, up to 9.8% less in the centre of gravity of rail foot, and up to 0.2% less in the centre of gravity of rail web, compared to the common engineering calculation. In addition, the maximum value of simulated temperature force, based on temperature stresses in the rail cross-section, was up to 5.3% less than the value obtained in the common engineering calculation. T2 - Construction and Building Materials T1 - Determination of temperature stresses in CWR based on measured rail surface temperatures VL - 284 DO - 10.1016/j.conbuildmat.2021.122713 ER -
@article{ author = "Mirković, Nikola and Brajović, Ljiljana and Popović, Zdenka and Todorović, Goran and Lazarević, Luka and Petrović, Miloš", year = "2021", abstract = "The main aim of conducted research is determination of temperature stresses due to the uneven temperature distribution in CWR. This paper presents a methodology for determination of temperature stresses in CWR based on (1) measurement system developed by the authors for measurement of rail surface temperatures, and (2) coupled transient thermal-stress analysis for simulation of rail temperature field and corresponding stresses. The main advantages of the proposed methodology are high sensitivity to the small temperature variations, taking into account the effect of thermal inertia, as well as measurement of single input parameter rail surface temperature. The obtained experimental results showed lower rail temperatures in sleeper zones and rail foot along CWR, which emphasize the effect of heat transfer between rail and sleeper, as well as rail foot and ballast. These effects of heat transfer directly influence the decrease of temperature stresses in the mentioned zones of CWR. The maximum values of simulated temperature stresses are up to 16% less in the centre of gravity of railhead, up to 9.8% less in the centre of gravity of rail foot, and up to 0.2% less in the centre of gravity of rail web, compared to the common engineering calculation. In addition, the maximum value of simulated temperature force, based on temperature stresses in the rail cross-section, was up to 5.3% less than the value obtained in the common engineering calculation.", journal = "Construction and Building Materials", title = "Determination of temperature stresses in CWR based on measured rail surface temperatures", volume = "284", doi = "10.1016/j.conbuildmat.2021.122713" }
Mirković, N., Brajović, L., Popović, Z., Todorović, G., Lazarević, L.,& Petrović, M.. (2021). Determination of temperature stresses in CWR based on measured rail surface temperatures. in Construction and Building Materials, 284. https://doi.org/10.1016/j.conbuildmat.2021.122713
Mirković N, Brajović L, Popović Z, Todorović G, Lazarević L, Petrović M. Determination of temperature stresses in CWR based on measured rail surface temperatures. in Construction and Building Materials. 2021;284. doi:10.1016/j.conbuildmat.2021.122713 .
Mirković, Nikola, Brajović, Ljiljana, Popović, Zdenka, Todorović, Goran, Lazarević, Luka, Petrović, Miloš, "Determination of temperature stresses in CWR based on measured rail surface temperatures" in Construction and Building Materials, 284 (2021), https://doi.org/10.1016/j.conbuildmat.2021.122713 . .
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