Optimisation of Scooter Frame for Target Life on 2-Poster Rig with Virtual Simulation 2019-26-0307
Automotive industry is giving lot of emphasis on the virtual validation to reduce the cost and turnaround time associated with product development cycle. In the initial design phases, it is important to do the frame evaluation through CAE (Computer Aided Engineering) based on available physical Two poster test data or standard service load conditions which cuts down the number of prototypes, time to market leading to business excellence.
A time domain assessment of the vehicle structure is time consuming and expensive which made us to think about an equivalent, alternative robust approach as explained in this work. The paper describes the strength analysis of scooter frame with derivation of critical static load cases. The critical load cases are extracted from the load-time history while the vehicle was simulated on durability virtual test rigs which is equivalent to proving ground tests. This methodology gives the better accuracy in prediction of stress levels and to avoid the overdesign of components based on traditional validation technique. There is significant drop in stress levels using the critical load cases as compared to conventional load case method.
The identified critical load cases were validated using the measured strain data and it shows good agreement of correlation with physical testing. Using this approach frame is optimized and no structural failures were seen in 2-poster test. It may give the possible elimination of the conventional SLA (Service load Analysis) load cases to avoid the overdesign of frame. Hence, this method can be very useful and effective for future design of frames not only for two wheeled vehicle but also can be extended to other automobiles.
Vikas Palve, Shyamsundar Kumbhar, Gyanendra Roy
Mahindra & Mahindra Ltd
Symposium on International Automotive Technology 2019