Alternative friction models for braking train dynamics

Autor:	Marius Adrian Spiroiu, Cătălin Cruceanu, Razvan Andrei Oprea
Rok vydání:	2013
Předmět:	Engineering Mathematical model business.industry Mechanical Engineering Numerical analysis Equations of motion Numerical integration Vehicle dynamics Differential inclusion Control theory Automotive Engineering Indeterminate system Contact dynamics Safety Risk Reliability and Quality business
Zdroj:	Vehicle System Dynamics. 51:460-480
ISSN:	1744-5159 0042-3114
Popis:	Braking dynamics plays an essential role in ensuring the comfort and running safety of trains. Due to the complexity of the phenomena involved and the presence of dry friction, studies have been carried out by numerical methods using smoothening. Based on the non-smooth dynamics framework, in the present paper, an efficient and comprehensive alternative model is defined. Set-valued friction of Coulomb's law type is accounted for and motion equations are formulated as a differential inclusion. Some of the fundamental issues of contact dynamics are briefly reviewed. Static friction forces which arise in buffers are computed in a very intuitive and efficient manner, using an original method involving generalised inverses of matrices. The corresponding algorithm is described. Numerical integration is done by an event-driven algorithm. Indeterminate system configurations can be appropriately handled. The number of vehicles on which tests have been carried out ranged from 5 to 50. Comparison with the smoothenin...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d3831f4b62eb3ad7671a6de6cff8da7e https://doi.org/10.1080/00423114.2012.744459 Zobrazit plný text záznamu