Study in the effect of excitation frequency on the acceleration response for fruit-trees

Abstract.

During the process of the vibratory harvesting to the fruit-trees, excitation energy transfers to the fruit and causes its acceleration to form the inertia force. When the inertia force is greater than the connecting force in fruit stalk, the fruits will drop off. For the fruit-trees outdoors, this paper researched the acceleration response on the branches by oscillating the trunk. The results indicate that the acceleration on the trunk has a quadratic curve increasing relationship with excitation frequency, corresponding to the results of theoretical derivation. Amongst three first rank offshoots, monitoring point position has little effect on the acceleration response. The acceleration still has a quadratic curve increasing relationship with excitation frequency. This research provides a certain theoretical basis for the further understanding of the vibration response and vibration mode to the fruit-tree.