Testing and modelling of transient adhesion phenomena in rolling-sliding contacts  

作　　者：Daniel KVARDA Alexander MEIERHOFER Klaus SIX 

机构地区：[1]Faculty of Mechanical Engineering,Brno University of Technology,Brno,61669,Czech Republic [2]Virtual Vehicle Research GmbH,Graz,8010,Austria

出　　处：《Friction》2024年第5期1016-1027,共12页摩擦（英文版）

基　　金：support within the COMET K2 Competence Centers for Excellent Technologies from the Austrian Federal Ministry for Climate Action(BMK);the Austrian Federal Ministry for Labour and Economy(BMAW),the Province of Styria(Dept.12)and the Styrian Business Promotion Agency(SFG).

摘　　要：Transient adhesion effects in rolling–sliding contacts influence all aspects of train–track interaction.This is of high importance specifically when these effects result in critically low adhesion,which poses a risk to traction and braking of railway vehicles.This study presents a model that can replicate the transient changes of the coefficient of adhesion with tested water and solid particle mix.The experimental data for the model are measured using a commercial ball-on-disc tribometer.The experimental results showed a liquid reservoir in front of the contact area that slowly reduces in size.This observation was used in the modelling approach to divide the calculation into two stages where the reservoir is present and when it disappears.The model was able to reproduce the occurrence of low adhesion region seen in experimental results with different particle concentrations.

关 键 词：coefficient of adhesion TRIBOLOGY transient effects wheel-rail contact 

分 类 号：TH117[机械工程—机械设计及理论]