Effect of Rail Vehicle–Track Coupled Dynamics on Fatigue Failure of Coil Spring in a Suspension System

In a rail vehicle, fatigue fracture causes significant number of failures in the coil spring suspension system. this work, origin these is examined by studying wheel–track interaction, modal analysis springs and stresses induced during operation. The tested experimentally, mathematical model developed to show its force vs. displacement characteristics. A vertical 10-degree-of-freedom (DOF) full-scale railway vehicle developed, showing motions car body, bogies wheelsets, which are then combined with track. internal resonances at nearly 50–60 Hz, where them. From stress result, weakest position innerspring identified few guidelines proposed for reduction vibration vehicles.