Based on concentration mass method

torsion vibration equivalent model of shafting system with multiple cardan joints is established

as well as torsion vibration dynamical equations of shafting system are presented by considering the transmission efficiency of cardan joints and the damper of transmission shafts.Accordingly

the effect of the stiffness of intermediate shafts and the angle between shafts on the response of shafting system angular velocity

the transmission accuracy and the transmission ratio are analyzed.Finally

the effect of different stiffness of shafts on shafting system is analyzed by instance solution.It provides theoretical references for keeping the torsion vibration of shafting systems used in aeroplane under restraint in its design

and for reducing the mass of driveline.