Analysis on Nonlinear Torsional Vibration and Experimental Study of Geislinger Coupling

摘要

Based on the dynamics of vehicle transmission system and theory of nonlinear vibration, considering structural characteristics and working principle of geislinger coupling, the loaded reeds are analyzed and calculating formula and dynamic characteristic curves of the nonlinear stiffness are obtained. The nonlinear torsional vibration mechanics model is obtained on the condition of plentifully considering the influences of disturbing torque, which are generated by the air pressure change of engine cylinders. Then the nonlinear vibration differential equations are solved by multiple-scale method,and the relations between excitation frequency and system resonance are discussed from three different sides that are main resonance, superharmonic resonance and subharmonic resonance. For gaining general dynamic characteristics, the torsional vibration experimentation of coupling is performed by applying stable sine signal excitation, and the accurate damping ratio is gained by analyzing test data. The results show that the mechanics model established by theoretical study can express well torsional vibration characteristics of the coupling, and give perfectly reference for the more studying.