Finite Element Analysis of an Olive Harvester Frame Based on Vibratory Harvesting
In order to develop a frame with sufficient high strength and stiffness to meet the operational requirements of olive harvester,this study adopts the simulation software Solidworks to model the frame of olive harvester in three dimensions,and uses Ansys Workbench to carry out the static structural analysis and modal analysis of the frame,and the results show that:under the static load,the maximum displacement of the frame is 0.022 mm,the maximum stress is 6.69 MPa,and the stress-strain of the frame meets the design requirements;the first 15 orders of the intrin-sic frequency obtained by finite element modal analysis are mainly 81.6～267 Hz.The maximum displacement of the rack under static load is 0.022 mm,the maximum stress is 6.69 MPa,and the stress-strain of the rack meets the de-sign requirements;the first 15 orders of intrinsic frequency of the rack obtained by finite element modal analysis are mainly in the range of 81.6～267.9 Hz,which is not in the same interval with the external excitation frequency,and will not produce resonance during the operation.Using the modal superposition method,the relationship between the vibration amplitude of the rack and the excitation frequency is determined by harmonic response analysis,and the reso-nance frequency point of the rack is found out,and it is determined that the frequency range in which it may vibrate substantially is 76.36～95.45 Hz,and the rack is empirically verified to be in line with the design requirements.Through the lightweight design of the rack,the optimized rack meets the working conditions while the quality of the rack is reduced by 14.3%to achieve the goal of lightweight.This study can provide a reference for the structure opti-mization of olive harvesting machine.
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