This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Effect of Seat Support Structure Stiffness on Handling of Motorcycles
Technical Paper
2008-32-0070
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Dynamic behavior of motorcycle is influenced by several parameters, which derive from various subsystems that go into making a motorcycle assembly and the way they are integrated. Structural stiffness has been a key consideration by most of the dynamics engineers, in design and tuning of motorcycle dynamics. Different approaches have been used in the study of structural stiffness effect, like lumped mass model, distributed stiffness model, static stiffness and dynamic stiffness. A limited research has been done on the effect of carrier luggage supported at rear end of the frame on steering oscillations. The authors of this paper found that the effect of significant changes in the parametric values of seat structure stiffness is not captured vividly in typical mathematical models available so far, whereas the experimental bikes built with such changes demonstrate substantial change in the dynamic behavior, quantified by both expert rider’s feel as well as objective measurements.
In this study the effect of seat support structure stiffness on motorcycle stability is studied under various loading conditions using simulation and testing. The vehicle behavior is tested with different dead weights on seat support structure. The stiffness and natural frequency of the structure is estimated using Finite element analysis. The simulation results are validated using experimental testing. The stiffness and natural frequency of the structure is improved using FEA. A proto has been made with increased stiffness and is tested at various speeds to understand the effect of stiffness and carrier mass on vehicle stability.
Recommended Content
Authors
Citation
Praveen, V., Sharma, D., Anand, R., Mangaraju, K. et al., "Effect of Seat Support Structure Stiffness on Handling of Motorcycles," SAE Technical Paper 2008-32-0070, 2008, https://doi.org/10.4271/2008-32-0070.Also In
References
- Sharp R. S. The Stability and Control of Motorcycles Journal of Mechanical Engineering and Science 13 5 1971
- Cossalter V. Lot R. Maggio F. The Modal Analysis of a Motorcycle in Straight Running and on a Curve Meccanica 39 1 16 2004 Kluwer Academic Publishers Printed in the Netherlands
- Sharp R. S. Alstead C. J. The Influence of Structural Flexibilities on the Straight-Running Stability of Motorcycles Vehicle System Dynamics 1980 9 327 357
- Verma M. K. Scott R. A. Segel L. Effect of Frame Compliance on the Lateral Dynamics of Motorcycles Vehicle System Dynamics 1980 9 181 206
- Roe G. E. Thorpe T. E. An experimental Investigation of the Parameters affecting the castor stability of road Wheels Journal of Mechanical Engineering and Science 16 2 1973
- Roe G. E. Pickering W. M. Zinober A. The Oscillations of a Flexible Castor and the effect of Front Fork Flexibility on the Stability of Motorcycles. SAE International Auto Eng Congress 1978 SAE No. 78-307
- Roe G.E. Thorpe T. E. The influence of Frame Structure on the Dynamics of Motorcycle Stability 1989 SAE No. 891772
- Giles C. G. Sharp R. S. Static and Dynamic Stiffness and Deflection Mode Measurements on a Motorcycle, Steering Behaviour 1983
- Venkata Mangaraju K. Shiwalik Ghosh. Anand R.B. Babu R. Venkatesan R. Vehicle handling comparison of motorcycles and Bebek vehicles SETC 2007-032-0109
- Katayama T. Nishimi, T. Energy flow method for the study of motorcycle wobble mode Vehicle System Dynamics 19 3 1990 151 175
- Imaizumi H. Fujioka T. Motorcycle-rider system dynamics by multibody dynamics analysis: effects of the rear load on wobble motions and the control assembly JSAE Review 19 1 Jan 1998 54 57