Vibration Analysis and Parameter Optimization of the Longitudinal Axial Flow Threshing Cylinder

The longitudinal axial flow threshing cylinder of the full feeding rice combine harvester is widely used in China and works with violent vibration. To explore source excitation affecting vibration to reduce vibration, a finite element modal analysis multipoint input output (MIMO) test were performed solve natural characteristics. By analyzing frequency, we concluded that main reason for resonance was coupling between rotation frequency first frequency. avoid influence realize lightweight design, proposed combination size optimization topology optimization. second orthogonal designed analyze maximum stress, deformation cylinder, reconstructed as central symmetrical structure balance rotational inertia force. field experiment results showed amplitudes optimized significantly lower than those original cylinder. This study provides ideas solving characteristics rotating parts an important reference design reduction weight key agricultural machinery.