The Relationship between Twist Axis and Effective Torsional Stiffness of a Motorcycle Frame
The design of a motorcycle frame has an important influence upon the machines weave and flutter oscillation characteristics. This paper deals particularly with the torsional stiffness of the frame and it underlines the importance of the position of the twist axis, i.e. the axis about which the frame twists. It is demonstrated that because the twist axis moves, the torsional stiffness of a frame may reduce as individual members are stiffened. The position of the twist axis of a motorcycle frame is determined by finite element techniques, and this is then related to its stability and handling characteristics.
KeywordsLateral Force Torsional Stiffness Rear Wheel Finite Element Technique Speed Flutter
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