江西农业大学学报2023，Vol.45Issue(6)：1504-1516,13.DOI:10.13836/j.jjau.2023138
面向夹持采收的油菜薹茎、枝、叶生物力学特性试验
Experimental Study on Biomechanical Characteristics of Rape Shoot Stems,Twigs and Leaves in Clamping Harvesting
摘要
Abstract
[Objective]This study aims to solve the problem that there is no basic data or reliable basis for reference in the mechanized orderly harvesting for rape shoots during the appropriate harvesting period and for the biomechanical characteristics of the clamping section closely related to the operation,[Method]Taking the initial shoot of the double low rapeseed"Nongda 2"during the harvesting period as the research object,the basic physical parameters of the stems,twigs,and leaves in the clamping section were measured.Using a universal testing machine combined with a YYD-1 stem strength tester,the biomechanical characteristics of stems and twigs with different diameters and leaves with different thicknesses in the clamping section were tested in three levels of size,namely Class A,Class B and Class C.[Result]The stem belongs to anisotropic materials,and the maximum bending force,maximum compression force,and maximum shear force of the stem and twigs were positively correlated with the diameter.The maximum compression force and maximum shear force of the leaves were positively correlated with the thickness.The maximum bending force,maximum radial compression force,maximum axial compression force,and maximum shear force ranges of the stem were 20.90-42.10 N,33.70-65.80 N,100.80-217.30 N and 26.30-46.90 N,respectively.The average maximum bending force,average maximum radial compression force,average maximum axial compression force,and average maximum shear force of the stem were 30.58 N,48.58 N,160.74 N,37.00 N,respectively.The maximum bending force,maximum box compression force,and the maximum shear force ranges of the twigs were 5.5-15.4 N,267.20-415.80 N and 7.20-9.20 N,respectively;The average maximum bending force,average maximum box compression force,and average maximum shear force of the twigs were 9.16 N,341.79 N,and 7.65 N,respectively.The maximum box compression force and maximum shear force ranges of the leaf were 23.20-40.70 N and 5.40-9.90 N,respectively.The average maximum box compression force and average maximum shear force of the leaf were 31.87 N and 7.65 N,respectively.[Conclusion]The results show that the stem belongs to anisotropic materials.The shear force of stem is much higher than that of twigs and moss leaves.The bending force of the stem is much higher than that of the twigs,but the elastic modulus and bending strength of the stem are obviously smaller than that of the twigs.The results can provide basic technical data support for mechanized harvesting and parameter selection of rape shoots.关键词
油菜薹/夹段部/力学特性/试验Key words
rape shoots/clamping section/mechanical characteristics/experiments分类
农业科技引用本文复制引用
谢伟,孟德鑫,蒋蘋,彭磊,欧阳琛..面向夹持采收的油菜薹茎、枝、叶生物力学特性试验[J].江西农业大学学报,2023,45(6):1504-1516,13.基金项目
湖南省自然科学基金项目(2021JJ40250) Project supported by Hunan Provincial Natural Science Foundation of China(2021JJ40250) 湖南省教育厅优秀青年基金项目(22B0220)和湖南省大学生创新训练项目(S202310537012)同时对本研究给予了资助,谨致谢意! （2021JJ40250）
