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Wheel-rail wear index prediction considering multiple contact patches
(Elsevier, 2009-06)
This paper shows a new wheel-rail contact model specially suited to obtain wear indexes between wheel and rail when the vehicle negotiates tight curves. The model presented in the paper enables introduction of the two ...
Equivalent Conicity and Curve Radius Influence on Dynamical Performance of Unconventional Bogies. Comparison Analysis
(Taylor and Francis, 2004)
In this paper the dynamic behaviour of several unconventional bogies is compared. The study takes into account the radius of the curve and the maximum level of wear allowed to the wheels. Ranges of conicities and curve ...
Influence of creep forces on the risk of derailment of railway vehicles
(Taylor & Francis, 2009)
The derailment mechanism in a railway vehicle is a complex mechanical phenomenon which has been, and still is, the subject of intense research activity due to the serious consequences it can entail. Since Nadal deduced his ...
Dynamic optimization of track components to minimize rail corrugation
(Elsevier, 2009-01)
In this paper, the influence on corrugation of the most significant track parameters has been examined. After this parametric study, the optimization of the track parameters to minimize the undulatory wear growth has been ...
A comprehensive method for the elastic calculation of the two-point wheel-rail contact
(Taylor & Francis, 2006)
This work shows the method developed to solve the wheel-rail contact problem via a look-up table with a three-dimensional elastic model. This method enables introduction of the two contact point effect on vehicle movement ...
A Metamodeling Technique for Variable Geometry Trusses Design via Equivalent Parametric Macroelements
(ASME, 2009-09-03)
A metamodeling methodology is applied to reduce the large computational cost required in the design of variable geometry trusses (VGTs). Using this methodology, submodels of finite elements within a complete FE model of ...
Analysis and Characterization of the Behaviour of a Variable Geometry Structure
(SAGE, 2007-11)
The study about a variable geometry truss is presented. The first step is a kinematic design and later an analysis using the MSC/Adams code. Then, the finite-element method with the MSC/Nastran code was used to develop a ...
FEM Subsystem Replacement Techniques for Strength Problems in Variable Geometry Trusses
(Elsevier, 2007-12-01)
This work presents the application of a procedure for replacing FEM subsystems with a high number of dofs (possibility of including mobile internal parts) using equivalent parametric macroelements (EPMs) with a much reduced ...