Theoretical and Experimental Research of BNES in Torsional Vibration Suppression of Rotor Systems

A bi-stable nonlinear energy sink (BNES) is proposed to suppress the torsional vibration of rotor systems. Firstly, the structure and working principles of BNES are introduced, and the dynamic equation of the rotor-BNES system is established. Then, the vibration suppression performance of BNES under transient and steady-state excitation is studied by the numerical calculation method, and compared with the linear dynamic vibration absorber(LDVA) with the same moment of inertia. Finally, a test platform is built to verify the capacity of BNES to suppress the torsional vibration of the rotor system. It is shown that the proposed BNES has a good vibration suppression effect on the transient response and steady-state response of the rotor system, and under the given parameters, the vibration suppression performance of BNES is better than that of LDVA. © 2023 Northeastern University. All rights reserved.