This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
A Unified Approach for Prediction and Control of Motorcycle Vibration Subjected to Engine Dynamic Force
Technical Paper
2014-01-2015
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
In this paper the approach to predict vibrations in motorcycles is presented. It can be divided mainly in two parts: prediction of engine forces using multi body dynamics (MBD) simulation and prediction of vibration response using FEA. Dynamic forces predicted at each engine mount through MBD simulation are used as input to FE analysis for vibration prediction.
Single cylinder SI engine having primary balancer shaft is considered to develop this methodology. Flexibilities of important parts are considered for MBD simulation. Crankshaft ball bearing which is used in almost all two wheeler engine is modeled with 6×6 stiffness matrix. It provides coupling between radial, axial and tilting deflections of bearing and it also allows moment transfer from crankshaft to casing. This helps to predict realistic forces at each bearing and engine mounts. Distribution of primary and secondary forces at crank bearings and at different engine mounts is studied.
Forces predicted from MBD simulation at each engine mounts are applied to full vehicle FE model. Forced response is predicted at each TSP and compared with test response at same point. It was found that predicted response was in well agreement with test response. Based on understanding of distribution of forces it is decided to increase mount stiffness of the support experiencing more force. This in turn helped to reduce vibration at TSP. This approach is effective to predict vibrations in early design stage to reduce development cost and time.
Recommended Content
Topic
Citation
Mohite, U. and Bhavsar, P., "A Unified Approach for Prediction and Control of Motorcycle Vibration Subjected to Engine Dynamic Force," SAE Technical Paper 2014-01-2015, 2014, https://doi.org/10.4271/2014-01-2015.Also In
References
- Kuwahara , H. , Aiba , Y. , and Akiba , M. Advanced Technology on Noise and Vibration in Motorcycles SAE Technical Paper 962488 1996
- Kosugi , T. and Seino , T. Application of Vibration Simulation Methods to the Design of Motorcycles SAE Technical Paper 891994 1989 10.4271/891994
- Kalsule , D. , Askhedkar , R. , and Sajanpawar , P. Engine Induced Vibration Control for a Motorcycle Chassis Frame by Right Combination of Finite Element Method and Experimental Techniques SAE Technical Paper 1999-01-1754 1999 10.4271/1999-01-1754
- Ghosh A. and Malik AK. Theory of Mechanism and Machine East West Press (Pvt) Ltd. New Delhi
- Vibration transmission through roller element bearing, Part I, bearing stiffness formulation Journal of Sound and Vibration 1990 139 2 179 199