成熟期大豆茎秆力学特性研究

为了降低冬小麦免耕播种机在工作时对大豆茎秆的打击,需要对大豆的茎秆进行力学特性分析.分别测量了不同节间的惯性矩、弹性模量及抗弯刚度等参数,发现惯性矩4-6节最大,弹性模量中部节间最低,而抗弯刚度呈线性降低.对大豆茎秆的微观结构与茎秆的力学特性关系进行了研究,结果表明,底部节间所需的剪切力、抗弯刚度较大,能够承受较大的弯曲力....

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Published in东北农业大学学报 Vol. 43; no. 5; pp. 46 - 49
Main Author 闫以勋 赵淑红 杨悦乾 田佰亮
Format Journal Article
LanguageChinese
Published 东北农业大学工程学院,哈尔滨150030 2012
Subjects
力学性质
大豆茎秆
弹性模量
惯性矩
抗弯刚度
大豆茎秆
弹性模量
抗弯刚度
力学性质
惯性矩
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ISSN1005-9369

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Summary:为了降低冬小麦免耕播种机在工作时对大豆茎秆的打击,需要对大豆的茎秆进行力学特性分析.分别测量了不同节间的惯性矩、弹性模量及抗弯刚度等参数,发现惯性矩4-6节最大,弹性模量中部节间最低,而抗弯刚度呈线性降低.对大豆茎秆的微观结构与茎秆的力学特性关系进行了研究,结果表明,底部节间所需的剪切力、抗弯刚度较大,能够承受较大的弯曲力.
Bibliography:Winter wheat is grown in the furrows sides at the mature stage of soybean crops. In order to reduce winter wheat no-tillage seeder stroke soybean stem in sawing, the mechanical properties in terms of moment of inertia, the elastic modulus and bending stiffness parameters of soybean stem were measured. We found that the inertia in four to six internode was the largest, the middle of elastic modulus was minimum, and bending stiffness was linear decrease. The correlation between microstructure of soybean stem and stem mechanical properties were also studied. The results showed that soybean stem bottom shear stress and bending stiffness were higher than the other two parts, which withstood greater impact force. These conclusions can provide basic parameters for the design of winter wheat no-tillage seeder.
YAN Yixun, ZHAO Shuhong, YANG Yueqian, TIAN Bailiang（School of Engineering, Northeast Agricultural University, Harbin 150030, China）
23-1391/S
soybean stem; mechanical properties; inertia; elastic modulus; bending
ISSN:1005-9369