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.
Dynamic Responses Due to Different Sub-rail Stiffness of Bolted Alloy Steel Frog
Lect. Notes Electrical Eng.
Proceedings of the 1st International Workshop on High-Speed and Intercity Railways ; Kapitel : 12 ; 147-154
2012-01-01
8 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
Dynamic Responses Due to Different Sub-rail Stiffness of Bolted Alloy Steel Frog
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