基于有限单元法的芦蒿茎秆力学特性分析

【目的】建立芦蒿Artemisia selengensis茎秆柔性体模型。【方法】根据芦蒿茎秆的物性参数，通过ANSYS有限元分析软件建立茎秆力学模型，对芦蒿茎秆在不同生长部位的轴向、径向压缩力学特性进行研究，分析比较模型计算值和试验测试值。【结果】模型计算值和试验测试值最大偏差为14.46%。芦蒿茎秆具有各向异性特征，其轴向压缩力学特性远大于径向；在3种不同位置段，径向压缩时，茎秆破碎出现在加载面的两端边缘位置，轴向压缩时，茎秆破碎出现在加载面，且应力由接近加载区域向周围逐渐减弱。【结论】可以运用模型仿真分析芦蒿茎秆力学特性，结果可为减少芦蒿在收获、运输、加工、储藏过程中的机械损伤和芦蒿收获...

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Bibliographic Details
Published in华南农业大学学报 Vol. 38; no. 3; pp. 106 - 111
Main Author 施印炎 李成光 汪小旵 章永年 OLUOCH Morice Odhiambo
Format Journal Article
LanguageChinese
Published 江苏省现代设施农业技术与装备工程实验室,江苏 南京,210031 2017
南京农业大学 工学院,江苏 南京,210031%南京农业大学 工学院,江苏 南京,210031
Subjects
力学特性
有限单元法
模型
芦蒿茎杆
Artemisia selengensis stalk
芦蒿茎杆
模型
有限单元法
mechanical property
model
力学特性
fimte element method
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ISSN1001-411X
DOI10.7671/j.issn.1001-411X.2017.03.017

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Summary:【目的】建立芦蒿Artemisia selengensis茎秆柔性体模型。【方法】根据芦蒿茎秆的物性参数，通过ANSYS有限元分析软件建立茎秆力学模型，对芦蒿茎秆在不同生长部位的轴向、径向压缩力学特性进行研究，分析比较模型计算值和试验测试值。【结果】模型计算值和试验测试值最大偏差为14.46%。芦蒿茎秆具有各向异性特征，其轴向压缩力学特性远大于径向；在3种不同位置段，径向压缩时，茎秆破碎出现在加载面的两端边缘位置，轴向压缩时，茎秆破碎出现在加载面，且应力由接近加载区域向周围逐渐减弱。【结论】可以运用模型仿真分析芦蒿茎秆力学特性，结果可为减少芦蒿在收获、运输、加工、储藏过程中的机械损伤和芦蒿收获机具的研制提供理论依据和参考。
Bibliography:Objective】 To establish a stalk flexible model of Artemisia selengensis.【Method】Based on the physical parameters of the stalk of A. selengensis, the finite element model of stalk was established by using the ANSYS software. The axial and radial mechanical properties of A. selengensis stalk at different growth positions under compression were studied. The model calculation value and experimental value were analyzed and compared.【Result】The maximum deviation of model calculation value and experimental value was 14.46%. A. selengensis stalk had anisotropic characteristics with its axial compression mechanical properties being much better compared to the radial. At three different positions, the stem breakage occurred on the edges of both ends of the loading surface under radial compression,while under axial compression, the stem breakage occurred on the loading surface, and the stress gradually receded from close to the loading area to surroundings. 【Conclusion】The mechanical properties of A. selengensis stalk c
ISSN:1001-411X
DOI:10.7671/j.issn.1001-411X.2017.03.017