Detail publikace
Vliv klimatických podmínek na adhezi mezi kolem a kolejnicí
GALAS, R. OMASTA, M. KŘUPKA, I. HARTL, M.
Český název
Vliv klimatických podmínek na adhezi mezi kolem a kolejnicí
Anglický název
Influence of climatic conditions on adhesion in the wheel-rail contact
Typ
článek ve sborníku ve WoS nebo Scopus
Jazyk
en
Originální abstrakt
The goal of this study was to investigate the effect of climatic conditions on adhesion in the wheel-rail contact. For this purpose, a ball-on-disc tribometer was utilized which enables to precisely control climatic conditions, mainly temperature and air humidity. Apart from these conditions, the influence of leaf layer on adhesion was investigated. The special attention was paid to water condensation which can cause a further adhesion decrease. Obtained results showed that a combination of high relative humidity and a presence of leaf layer can significantly reduce adhesion in the contact, even below a value 0.1 which is needed to traction and braking.
Český abstrakt
Cílem práce je popsat vliv klimatických podmínek na adhezi v kontaktu kola a kolejnice. Experimenty byly provedeny na tribometru v konfiguraci ball-on-disc, který umožňuje simulaci různých klimatických podmínek. V rámci této studie byl zkoumán vliv teploty a vlhkosti vzduchu na adhezi. Současně byla část experimentů provedena s diskem na kterém byla předem připravena tenká vrstva z listí a listového extraktu. Výsledky studie ukázaly, že kombinace vysoké relativní vlhkosti a přítomnosti listí může vést k redukci adheze až pod hodnotu 0,1, která je nezbytná pro bezpečnou trakci a brzdění vozidel.
Anglický abstrakt
The goal of this study was to investigate the effect of climatic conditions on adhesion in the wheel-rail contact. For this purpose, a ball-on-disc tribometer was utilized which enables to precisely control climatic conditions, mainly temperature and air humidity. Apart from these conditions, the influence of leaf layer on adhesion was investigated. The special attention was paid to water condensation which can cause a further adhesion decrease. Obtained results showed that a combination of high relative humidity and a presence of leaf layer can significantly reduce adhesion in the contact, even below a value 0.1 which is needed to traction and braking.
Klíčová slova česky
Adheze; kontakt kola a kolejnice; vlhkost
Klíčová slova anglicky
Adhesion; wheel-rail contact; humidity
Vydáno
17.09.2018
Nakladatel
Malaysian Tribology Society
Místo
Malajsie
ISBN
978-967-13625-2-5
Kniha
Proceedings of Asia International Conference on Tribology 2018
Strany od–do
242–243
Počet stran
2
BIBTEX
@inproceedings{BUT170146,
author="Radovan {Galas} and Milan {Omasta} and Ivan {Křupka} and Martin {Hartl},
title="Influence of climatic conditions on adhesion in the wheel-rail contact",
booktitle="Proceedings of Asia International Conference on Tribology 2018",
year="2018",
month="September",
pages="242--243",
publisher="Malaysian Tribology Society",
address="Malajsie",
isbn="978-967-13625-2-5"
}