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- 저자 : Joao Pombo (검색결과 1 건)
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A Computational Efficient General Wheel-Rail Contact Detection Method
Joao Pombo,Jorge Ambrosio 대한기계학회 2005 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.19 No.1S
The development and Implementation of an appropriate methodology for the accurate geo-metric description of track models is proposed in the framework of multibody dynamics and It includes the representation of the track spaual geometry and Its irregula갸샫s The wheel and rail surfaces are parameterized to represent any wheel and rail profiles obtained from direct measurements or design requirements A fully generic methodology to determine, online during the dynamic simulation, the coord mates of the contact points, even when the most general three dimensional motion of the wheelset with tespect to the tails is proposed This methodology is applted to study specific Issues in railway dynamics such as the flange contact problem and lead and lag contact configurations A formulation for the description of the normal contact forces, which result from the wheel-rail Interaction, is also presented The tangential creep forces and moments that develop in the wheel-rail contact area are evaluated using Kalker linear theory, Heuristic force method, Polach formulation The methodology is Implemented in a general multibody code The discussion is supported through the application of the methodology to the railway vehicle ML95, used by the Lisbon metro company<br/>
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