Analysis on Dynamics Characteristics of Vibratory Harvestingfor Oil-tea Camellia Fruit

摘要

Manual harvesting on oil-tea camellia fruit is labor-intensive and high cost In order to improve the harvesting efficiency of camellia fruit, the growers are seeking alternatives. Mechanical vibration could be an option which requires appropriate vibratory mechanism to generate the necessary vibration. The vibration parameters which determine the harvesting efficiency must be characterized before designing the mechanism. The finite element model is inconvenient to be used due to the diversity and complexity of the tree although the model can simulate multiple modals of the tree. To facilitate analyzing the dynamics characteristics of the camellia tree, a three-degree-of-freedom model under forced vibration was established for the tree in canopy shaking condition. The growth environment and basic physical characteristics of camellia tree were investigated. The natural frequency of the camellia tree was obtained by the dynamic model. The solid model of the camellia tree was built in Solidworks and ANSYS, and the modal analysis and harmonic response simulation were carried out The simulation results were compared with the dynamic model, which verified the validity of the three-degree-of-freedom forced vibration system model. The method proposed in this paper can be used as a way to select optimal vibration frequency and amplitude for vibratory harvest.