Abstract: The principle of torsion vibration is analyzed for 3-d knottiness hooke’s coupling, and the effect of , parameters, characteristics of unequal speed of master and slave rotating part on dynamic amplification factor is discussed by trail-and-error-method. The method for reducing the dynamical amplification factor and disuniform speed are put up, and the stiffness, inertia, the angle are chosen optimal. Based on the method to design the 3-d knottiness gimbale transmission shaft, the torsion vibration is reduced, and the syntony is also avoided.

Key words: 3-D interspace, Dynamic amplification factor, Torsion vibration, assessment method, flat rolling mill, shape control