According to the characteristics of the tracked ambulance vibration-reduction system, the cubic nonlinearity of the zero stiffness damper was statistical linearized and a 9-DOF model of the vibration-reduction system was established. According to the multipoint pseudo excitation method, the pseudo excitation on the vibration-reduction system was obtained. Based on the system frequency response function, the pseudo response was obtained. Then, the influence of the parameters of the system on the vibration-reduction effect was studied and the weighted vertical root mean square values of the stretcher base's acceleration was calculated. The research results can provide a theoretical basis for improving the efficiency of vibration-reduction system.
展开▼
