Abstract
The sub-rail stiffness of bolted alloy steel frog has a great influence on impact load of rail head and rail internal tensile stress. So it is very essential to optimize the sub-rail stiffness and carry on a fatigue calculation on weak frog components to guide frog design. Taking No.12, bolted alloy steel frog, single-way turnout as an example, the rules of frog stresses and deformations influenced by different sub-rail stiffness under the train dynamic load were analyzed and compared based on the finite element method, and carried on a fatigue calculation on the weak zone of the frog centre. It turned out that as the sub-rail stiffness increases, the rail impact load by train increase, and rail tensile stress and vertical deformation both decrease. A proposal sub-rail stiffness is 50kN/mm; The maximum fatigue stress appears in the zone where the frog centre sections change greatly, so the nose rail structure in this zone should be optimized.
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© 2012 Springer-Verlag GmbH Berlin Heidelberg
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Cao, Y., Wang, P., Zhao, W. (2012). Dynamic Responses Due to Different Sub-rail Stiffness of Bolted Alloy Steel Frog. In: Ni, YQ., Ye, XW. (eds) Proceedings of the 1st International Workshop on High-Speed and Intercity Railways. Lecture Notes in Electrical Engineering, vol 147. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-27960-7_12
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DOI: https://doi.org/10.1007/978-3-642-27960-7_12
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-27959-1
Online ISBN: 978-3-642-27960-7
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