Modelling and Vibration Analysis of Powertrain System

Developments in vehicle technology reveal that increased demands on vehicle comfort and fuel efficiency in the vehicles require to design more efficient powertrain systems. Vibrations originated in the engine need to be well optimized and controlled at desired limits. For this purpose, modal analyis for vehicle components is the main analysis method to evaluate the vibration behaviours. During vehicle design, important parameters for vehicle vibration such as inertia and stiffness are investigated and modified values to be replaced to get lower vibration values by means of the modal analysis. In this study, the truck powertrain system is modelled with real system values by the 1-D analysis software program and modal analysis is performed to find mode shapes and vibration magnitudes of the powertrain system components. Mode shapes of the clutch damper was investigated by changing damper stiffness values and the other components variables were taken constant to evaluate the stiffness effects on the system by modal analysis.