Investigation and suppression of impact torsional vibration of a rolling mill’s nonlinear drive system

The dynamic equations of the main drive system of a two-mass rolling mill with nonlinear damping and nonlinear stiffness were established under the action of impact moment.The stability of the system was analyzed,and the influences of damping and stiffness on the stability of the system were given.The system's first-order approximate solution was obtained with the aid of multiple time scales method,so the impact torsional vibration responses of the system were obtained.By means of simulation,the influences of nonlinear damping and nonlinear stiffness of the shafting on the vibration responses of the rolling mill's drive system were discussed.Finally,the approaches to impact vibration reduction of the rolling mill were found.The research results provided a theoretic basis and a reference for suppression of torsional vibration of rolling mill caused by impact disturbance.