Vibration Suppression of Vehicle Dual rotor Flywheel Battery Based on Nonlinear Energy Sink

A 14 degree of freedom mechanical model of the dual rotor flywheel battery under the influence of tilt angle was established based on the overall method and isolation method, and its differential equations were derived. The fourth-order Runge Kutta method in Matlab was used to solve and analyze the vibration characteristics of the flywheel rotor.The relationship curve between the maximum radial amplitude of the rotor and the vehicle wheelbase, flywheel inclination angle, road excitation amplitude, and frequency was obtained. By numerical analysis methods, the optimal solution for symmetrically installing a nonlinear energy sink(NES) at a distance from the vehicle's center of mass was determined.The influence of various parameters of NES on the vehicle's flywheel system was analyzed, and three optimization objective functions were established to optimize linear damping. The experiment showed that the optimized design scheme of nonlinear energy sink had good vibration reduction effect. The research results contributed to understanding the vibration characteristics of dual rotor flywheel battery systems and provided theoretical guidance for improving their operational stability.