TY  - 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 . .

TY  - CONF
AU  - Todorović, Goran
AU  - Brajović, Ljiljana M.
AU  - Malović, Miodrag
AU  - Gospavić, Radovan
PY  - 2013
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6039
AB  - U radu su prikazani rezultati in situ merenja temperaturskog polja i osvetljenosti jednog prozora poslovne zgrade u Beogradu u periodu od mesec dana i razvijen fizički model za izračunavanje koeficijenta prolaza toplote i solarnih dobitaka. Vršena su merenja temperature vazduha u neposrednoj blizini stakla simetrično postavljenim data logerima i temperature vazduha sa spoljašnje i unutrašnje strane prostorije. Osvetljenost je merena luksmetrima i fotonaponskim ćelijama sa obe strane prozora. Rezultati dobijeni na ovaj način su upoređeni sa proračunima na bazi standarda iz oblasti energetske efikasnosti prozora SRPS EN ISO 10077 i zgrada SRPS EN ISO 13790.
PB  - Društvo Metrologa Srbije
C3  - Zbornik radova Kongresa Metrologa 2013
T1  - Određivanje koeficijenta prolaza toplote i solarnih dobitaka prozora merenjem temperature i osvetljenosti
UR  - https://hdl.handle.net/21.15107/rcub_technorep_6039
ER  - 

@conference{
author = "Todorović, Goran and Brajović, Ljiljana M. and Malović, Miodrag and Gospavić, Radovan",
year = "2013",
abstract = "U radu su prikazani rezultati in situ merenja temperaturskog polja i osvetljenosti jednog prozora poslovne zgrade u Beogradu u periodu od mesec dana i razvijen fizički model za izračunavanje koeficijenta prolaza toplote i solarnih dobitaka. Vršena su merenja temperature vazduha u neposrednoj blizini stakla simetrično postavljenim data logerima i temperature vazduha sa spoljašnje i unutrašnje strane prostorije. Osvetljenost je merena luksmetrima i fotonaponskim ćelijama sa obe strane prozora. Rezultati dobijeni na ovaj način su upoređeni sa proračunima na bazi standarda iz oblasti energetske efikasnosti prozora SRPS EN ISO 10077 i zgrada SRPS EN ISO 13790.",
publisher = "Društvo Metrologa Srbije",
journal = "Zbornik radova Kongresa Metrologa 2013",
title = "Određivanje koeficijenta prolaza toplote i solarnih dobitaka prozora merenjem temperature i osvetljenosti",
url = "https://hdl.handle.net/21.15107/rcub_technorep_6039"
}

Todorović, G., Brajović, L. M., Malović, M.,& Gospavić, R.. (2013). Određivanje koeficijenta prolaza toplote i solarnih dobitaka prozora merenjem temperature i osvetljenosti. in Zbornik radova Kongresa Metrologa 2013
Društvo Metrologa Srbije..
https://hdl.handle.net/21.15107/rcub_technorep_6039

Todorović G, Brajović LM, Malović M, Gospavić R. Određivanje koeficijenta prolaza toplote i solarnih dobitaka prozora merenjem temperature i osvetljenosti. in Zbornik radova Kongresa Metrologa 2013. 2013;.
https://hdl.handle.net/21.15107/rcub_technorep_6039 .

Todorović, Goran, Brajović, Ljiljana M., Malović, Miodrag, Gospavić, Radovan, "Određivanje koeficijenta prolaza toplote i solarnih dobitaka prozora merenjem temperature i osvetljenosti" in Zbornik radova Kongresa Metrologa 2013 (2013),
https://hdl.handle.net/21.15107/rcub_technorep_6039 .

TY  - CONF
AU  - Brajović, Ljiljana M.
AU  - Todorović, Goran
AU  - Simić, Milivoje
AU  - Malović, Miodrag
AU  - Pavićević, Dušan
PY  - 2004
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6042
AB  - U radu su ispitivane karakteristike odziva drvenih pločica za izgradnju violina na akustičku beskontaktnu pobudu od 420 Hz. Eksperimenti su izvođeni na aparaturi koja je posebno razvijena za ova merenja. Pločice istih dimenzija su napravljene od istog komada kvalitetnog smrekovog drveta i pre merenja su termički i hemijski obrađene sa ciljem ispitivanja uticaja obrade na akustički odziv. FFT analiza odziva pločica je pokazala da način pripreme pločice ima uticaj na spektar odziva. Hemijski i termički obrađene pločice, naročito na nižim temperaturama, su dale odzive u kojima dominira pobudna frekvencija, dok su prirodno sušene i termički obrađene na 
visokim temperaturama imale značajne komponente odziva i na višim harmonicima.
PB  - Društvo za ETRAN
C3  - Zbornik radova XLVIII konferencije ETRAN
T1  - Elektroakustička ispitivanja drvenih elemenata za izradu rezonatora violina
SP  - 383
VL  - 2
VL  - 385
UR  - https://hdl.handle.net/21.15107/rcub_technorep_6042
ER  - 

@conference{
author = "Brajović, Ljiljana M. and Todorović, Goran and Simić, Milivoje and Malović, Miodrag and Pavićević, Dušan",
year = "2004",
abstract = "U radu su ispitivane karakteristike odziva drvenih pločica za izgradnju violina na akustičku beskontaktnu pobudu od 420 Hz. Eksperimenti su izvođeni na aparaturi koja je posebno razvijena za ova merenja. Pločice istih dimenzija su napravljene od istog komada kvalitetnog smrekovog drveta i pre merenja su termički i hemijski obrađene sa ciljem ispitivanja uticaja obrade na akustički odziv. FFT analiza odziva pločica je pokazala da način pripreme pločice ima uticaj na spektar odziva. Hemijski i termički obrađene pločice, naročito na nižim temperaturama, su dale odzive u kojima dominira pobudna frekvencija, dok su prirodno sušene i termički obrađene na 
visokim temperaturama imale značajne komponente odziva i na višim harmonicima.",
publisher = "Društvo za ETRAN",
journal = "Zbornik radova XLVIII konferencije ETRAN",
title = "Elektroakustička ispitivanja drvenih elemenata za izradu rezonatora violina",
pages = "383",
volume = "2, 385",
url = "https://hdl.handle.net/21.15107/rcub_technorep_6042"
}

Brajović, L. M., Todorović, G., Simić, M., Malović, M.,& Pavićević, D.. (2004). Elektroakustička ispitivanja drvenih elemenata za izradu rezonatora violina. in Zbornik radova XLVIII konferencije ETRAN
Društvo za ETRAN., 2, 383.
https://hdl.handle.net/21.15107/rcub_technorep_6042

Brajović LM, Todorović G, Simić M, Malović M, Pavićević D. Elektroakustička ispitivanja drvenih elemenata za izradu rezonatora violina. in Zbornik radova XLVIII konferencije ETRAN. 2004;2:383.
https://hdl.handle.net/21.15107/rcub_technorep_6042 .

Brajović, Ljiljana M., Todorović, Goran, Simić, Milivoje, Malović, Miodrag, Pavićević, Dušan, "Elektroakustička ispitivanja drvenih elemenata za izradu rezonatora violina" in Zbornik radova XLVIII konferencije ETRAN, 2 (2004):383,
https://hdl.handle.net/21.15107/rcub_technorep_6042 .