农业机械学报2026，Vol.57Issue(9)：237-245,9.DOI:10.6041/j.issn.1000-1298.2026.09.022
基于结构声强法的红枣树振动能量传递特性研究
Vibration Energy Transfer Characteristics of Jujube Trees Based on Structural Intensity Method
摘要
Abstract
Aiming to investigate the energy transfer characteristics and patterns of jujube trees during vibratory harvesting,a visualization analysis method for the structural intensity of jujube trees was proposed.By integrating ANSYS and self-developed Matlab programs,a structural intensity vector field analysis model for jujube trees was established,and the structural intensity vector field of jujube trees under different excitation conditions was solved and visualized.Quantitative analysis based on the vibrational energy flux ratio revealed the following:at low-frequency vibrations(the 1st and 2nd natural frequencies),energy primarily remains in the trunk;as the frequency increases(the 3rd and 4th natural frequencies),energy was uniformly transferred to various structural parts of the jujube tree.Under circular or linear excitation,energy mainly stayed in the trunk,whereas under non-circular or three-dimensional excitation,energy was evenly distributed to all structural parts of the jujube tree.As excitation time increased,the energy transfer path gradually changed,but it stabilized after 3 seconds.The energy transfer efficiency was positively correlated with excitation height.Changes in excitation force did not affect the energy transfer path.For side branches at similar heights,energy transfer efficiency was positively correlated with the cross-sectional area at the connection and the length of the side branch,but negatively correlated with the growth angle.For side branches on the same side,as the height of the side branch increased,energy transfer efficiency was negatively correlated with the cross-sectional area at the connection and the length of the side branch.For side branches with similar growth angles,energy transfer efficiency was positively correlated with the height of the connection point but negatively correlated with the cross-sectional area and the length of the side branch.For side branches of similar length,energy transfer efficiency was positively correlated with the height of the connection point and the growth angle but negatively correlated with the cross-sectional area.Vibration experiments verified that the relative error of the analysis model was within 7.3％,indicating high reliability.关键词
红枣树/能量传递/结构声强法/通量比/振动采收Key words
jujube tree/energy transfer/structural intensity method/flux ratio/vibratory harvesting分类
农业科技引用本文复制引用
魏娟,王子康,马廷军,王川伟,马逾,武导侠..基于结构声强法的红枣树振动能量传递特性研究[J].农业机械学报,2026,57(9):237-245,9.基金项目
陕西省重点研发计划项目(2024NC-YBXM-208)和西安市科技计划项目(25NJSYB00007) （2024NC-YBXM-208）
