Self-excited vibration caused by universal joint friction and stability analysis of automobile transmission shaft
Aiming at the problem that the transmission shaft of a four-wheel drive vehicle impacts the support limit under the rapid acceleration condition,the lateral motion equation of the transmission shaft system considering the internal friction of the universal joint was established,and the self-excited vibration of the transmission shaft caused by the internal friction of universal joint was identified.The ADAMS model of the transmission system including Dahl friction of the universal joint was established and the influence of the main parameter changes on the system stability was evaluated by using the instability speed,then,a vehicle verification was carried out.The results showed that the system stability could be improved by reducing friction,increasing support stiffness,and optimizing angle of the shaft.Finally,a combination of changing universal joint to DO joint and optimizing stiffness of support was adopted to eliminate the self-excited vibration of transmission shaft,which verified the effectiveness of this method.
friction of universal jointsupport stiffnessself-excited vibrationtransmission shaft angle
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