Published Paper Details:

Spring is a mechanical element which is used to reduce the shocks and vibrations in any vehicle. In Railways we have two different types of suspensions which absorb the shocks and vibrations and balance the entire system under dynamic conditions. The springs both primary and secondary suspensions which have been using for the passenger railway trains are single coil helical suspension springs. Here in this paper the railway primary suspension spring is considered for the study. The concentric springs which have more than one spring with same central axis can able to bear the loads and withstand to the stresses and deformations better compared to the single helical coil springs. So, here in this present study the locomotive primary suspension is replaced with the concentric springs which have two springs with same axis one inside of the other spring. Chromium vanadium steel material is taken for the analyses of both the concentric and helical coil springs. The both concentric spring and helical coil springs are designed in Solidworks modeling software. Static, modal analyses are conducted in finite element analysis commercial tool ANSYS 15.0. The stress distributions, displacements are analyzed in Static analysis. The natural Frequencies and mode shapes are analyzed in Modal analysis. Comparison of stresses, deformations and natural frequencies for both the single helical coil primary suspension spring and replaced concentric springs are studied to determine better spring.