Libro

Descripción

The investigation into the failure of a wAG-9 type electric rail vehicle, of Indian Railways' fleet used for goods train hauling and maintenance at Ajani, Nagpur Electric Loco Shed of central railway, is necessary to identify the cause of failure. Failure investigation begins with an experimental spectroscopy analysis to find chemical composition of the failed specimens of springs and it is observed that all parameters are within the recommended range. Static stress analysis is then used to analyze the vibrance response of the actual suspension system and measure the frequency of excitation and natural frequency of the system. Fatigue analysis is done using finite element method to investigate the effect of dynamic loading on the failures of suspension spring. To avoid failures, modifications are suggested in the suspension system, such as those made by Electric Locos Shed, Ajni, Nagpos and other loco sheds, which are shown to reduce failures by 88%. MATLAB Simulink is also used to measure the vibration response of actual suspension systems.