| 小麦茎秆截面椭圆化的模拟与分析 |
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| 引用本文： | 袁志华,梁爱琴,张秀丽,李慧琴,王栋.小麦茎秆截面椭圆化的模拟与分析[J].湖北农业科学,2012,51(18):4113-4115. |
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| 作者姓名： | 袁志华 梁爱琴 张秀丽 李慧琴 王栋 |
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| 作者单位： | 河南农业大学机电工程学院,郑州,450002 |
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| 基金项目： | 河南省自然科学研究项目(2009B2016) |
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| 摘 要： | 利用有限元软件ANSYS/LS-DYNA建立含有5个节间的小麦茎秆模型,模拟分析了典型风荷载作用下小麦茎秆截面椭圆化的变化特性.模拟结果表明,小麦茎秆穗部在爆炸风荷载作用下,基部节间截面是否椭圆化与风荷载的冲量大小有关,冲量越小截面越不易椭圆化,茎秆越不易倒伏.沿整个茎秆轴线,截面椭圆化区域应力值最大,非椭圆化区域应力值偏小.
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| 关 键 词： | 小麦 倒伏 风荷载 有限元 冲量 |
Simulation and Analysis on Ovalization of Wheat Stem Section |
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| YUAN Zhi-hua
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LIANG Ai-qin
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ZHANG Xiu-li
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LI Hui-qin
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WANG Dong.Simulation and Analysis on Ovalization of Wheat Stem Section[J].Hubei Agricultural Sciences,2012,51(18):4113-4115. |
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| Authors: | YUAN Zhi-hua LIANG Ai-qin ZHANG Xiu-li LI Hui-qin WANG Dong |
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| Institution: | (College of Mechanical and Electrical Engineering,Henan Agricultural University,Zhengzhou 450002,China) |
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| Abstract: | In order to find the change characteristics of ovalization of wheat stem section under typical wind load,wheat stem models including 5 internodes were established using finite element software ANSYS/LS-DYNA;and the process of wheat stem section ovalization were simulated.The simulation results showed that wheat stem section ovalization was related to impulse of explosion wind load.The smaller the impulse was,the harder the ovalization of section and lodging of stem.Along the entire stem axis,the maximum stress value was in the ovalization area;the stress values were small in other areas. |
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| Keywords: | wheat lodging wind load finite element impulse |
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