Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 11 of 11 for “"wheelset"”.
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Fault tolerant strategy for actively controlled railway wheelset
Traditionally, solid axle railway wheelsets are stabilised by using passive suspensions on a conventional rail vehicle, but such additional stiffness affects the pure rolling action of the wheelset around the curve. It has been theoretically proven that this design conflict between stability and …
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Semi-active control for independently rotating wheelset in railway vehicles with MR dampers
… in primary suspension for independent rotation wheelsets in railway vehicles. Computer simulation results verified the suggested semi-active control is able to provide required stability and guidance control for independently- rotating wheelsets. Also, the result performed as well as full active …
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Analysis on actuator dynamics in active wheelsetcontrol
… in the implementation of active solid–axle wheelset control systems, for primary suspensions of the railway vehicles, and the effects of actuator dynamics on the overall active control system. The research is focused on the use of electric–mechanical (EM) actuators and it addresses on two …
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A comparative study of modified passenger railway vehicle trucks
… performance of such a vehicle is poor because of wheelset misalignment in curves resulting in increased wheel and rail wear. This increases the maintenance cost. The wheelset misalignment also leads to increased lateral forces which raises the potential for derailment due to wheel climb. One of …
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Prediction of wheel wear profiles by analytical methods
… coefficients are determined as functions of the wheelset lateral position. Second, a time history of the wheelset positions and velocities is determined from a simulation of the vehicle response to a specified track input. Finally, a wear algorithm dependent on the geometry and the dynamics is …
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Nonlinear Investigation of the Use of Controllable Primary Suspensions to Improve Hunting in Railway Vehicles
… study of the lateral stability of a single wheelset, a single truck, and the complete rail vehicle has been performed. This study investigates bifurcation phenomenon and limit cycles in rail vehicle dynamics. Sensitivity of the critical hunting velocity to various primary and secondary …
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Investigation of the finite element method for computing wheel/rail contact forces in steady curving
… in the contact region. This work uses a generic wheelset model which is the basic component of any rail vehicle model. The wheel/rail interaction is modelled using the finite element method. The wheel is generated as a surface of revolution of its tread profile, and the rail is generated as an …
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Multiple model based real time estimation of wheel-rail contact conditions
… these variations in the dynamic response of the wheelset,developing useful contact condition information. The proposed system involves the useof a number of carefully selected mathematical models (or estimators) of a rail vehicle tomimic train dynamic behaviours in response to different track …
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Vertical dynamics of railway vehicle-track system
… equivalent mass. Elastomeric shear pads on the wheelset bearing, and reduced rail-pad stiffness, can potentially reduce dynamic bearing force and tie dynamic load, respectively. The magnitude of resonant force for vehicle-track system in a steady-state interaction mainly depends on the unsprung …
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Development of a methodology for calculating stresses in track components
An existing analytical model, in use by Spoornet for the past two decades for calculating rail stresses on railway track, was revisited and improved. The model provided engineers with an easy-to-use program for evaluating track capacity and authorizing heavier loads on track. The model was modified …
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Die Gesetzmäßigkeiten des Fahrwerklaufs erprobter Multigelenk-Niederflurstadtbahnwagen
… precondition for this is to abandon the wheelsets and the principle of placing the drive motors between the wheels. Thus all according vehicle designs have independent wheels instead of the previously used conventional wheelsets. Moreover, the 100% low-floor design reduces drastically the …