Multidirectional Dynamic Response and Swing Shedding of Grapes: An Experimental and Simulation Investigation under Vibration Excitation

During mechanized table grape harvesting, berries are subjected to vibration and collision, which can cause shedding damage the fruit. Research on berry has primarily focused macroscopic swing modes, reflected in integrated cluster structure idealized particle interactions, as well static response treatments. However, these approaches unable accurately explain characteristics of wobbling during picking, predict shedding-prone areas, or identify factors affecting shedding. In this paper, we study dynamic X, Y, Z directions by establishing a model combining harmonic random with finite element analysis. Our studies revealed that exhibit various forms (swinging rebounding) under same stimulus harvesting. The amplitude were 14.71, 12.46, 27.10 mm, respectively, most obvious being direction flattest Y direction. Berries lower cob system part relatively stable, while those upper right side more prone swinging falling, areas likely fall off concentrated side. This predicted fruit harvesting provided an ideal basis for Optimization research collection equipment may benefit from theoretical basis.