Abstract
The article discusses the use of pivot bearing friction liners, made of selected materials, in railway freight wagons’ spherical centre bowls. Comparative studies on the effect of suspension dynamics on the equivalent stresses in the liner material were carried out using the finite element method and multibody simulation. The results show the magnitude and location of the highest stresses in the liner with varying input loads, friction coefficients and interacting materials. The analysis is a basis for a simulation method for predicting the fatigue life of the suspension friction liner placed in the centre bowl between the bogie frame and the vehicle body.
Highlights
Over the last decades, freight wagon operators have started to use a wide range of non-metallic friction liners made of various materials such as polymeric materials with modifying agents or resin-based composites
Comparative studies were presented on the effects of the dynamics of the suspension
Comparative studies were presented on the effects of the dynamics of the suspension on the multiaxial stresses in the suspension liner material using FEM and MBS simulation, considering the loads that may occur in the actual operating conditions of the vehicle
Summary
Freight wagon operators have started to use a wide range of non-metallic friction liners made of various materials such as polymeric materials with modifying agents or resin-based composites. ) a freight wagon with 30 degrees of freedom was built, in which the relevant vehicle elements in the form of rigid bodies are connected by means of elastic damping elements,ofincluding pairs with dry where: 2a*—distance between theand pivots, 2a+ —spacing wheelsetsfriction in the bogie, R—the friction between and the body. An example example of of characteristics characteristics of of the the friction friction torque torque between between the the boogie boogie and and the the loaded loaded wagon wagon body body as as aa Figure function of the angle of bogie rotation with respect to the vertical axis
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