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Research on Detection of Rail Temperature Stress Using Rail Vibration Characteristics
Abstract
In this study, a finite-element model of axial loads on a rail in a ballastless track was established based on the theory of vehicle-track coupling dynamics into consideration of the rotational inertia and shear deformations of the beam. Based on the theoretical analysis, the rail vibration characteristics were studied using an experimental model under different forces. As a result, the main vibration characteristics of the rail were obtained. The model employed is found to be useful for studying the relationship between the temperature stress and the vibration characteristics of the rail. Furthermore, it can be applied to predict the safety and reliability of a rail under different temperature stresses using the rail vibration characteristics.