基于有限元法的大豆种子碰撞模拟分析  

Simulation collision analysis of soybean seed based on finite element method

作　　者：顿国强 李海山 于春玲 杨永振 高志勇 毛宁 张时雨 DUN Guoqiang;LI Haishan;YU Chunling;YANG Yongzhen;GAO Zhiyong;MAO Ning;ZHANG Shiyu(College of Mechanical and Electrical Engineering,Northeast Forestry University,Harbin 150040,China;College of Engineering and Techology,Northeast Forestry University,Harbin 150040,China)

机构地区：[1]东北林业大学机电工程学院,黑龙江哈尔滨150040 [2]东北林业大学工程技术学院,黑龙江哈尔滨150040

出　　处：《河南农业大学学报》2020年第4期620-629,共10页Journal of Henan Agricultural University

基　　金：国家重点研发计划项目(2018YFD0201001);中央高校基本科研业务费专项资金项目(2572017BB10);中央高校建设世界一流大学(学科)和特色发展引导专项资金暨双一流经费项目(41113278)。

摘　　要：针对大豆种子在脱粒过程中与脱粒机械部件碰撞导致其机械性损伤而影响出苗的问题,基于合农60品种参数统计的结果,利用有限元法模拟大豆种子的碰撞过程,分析其内部应力分布与位移形变随时间的变化。首先,通过全因素试验分析碰撞速度及接触半径对最大应力及最大位移的影响。结果表明,在信度水平为0.01时,对于最大应力和最大位移试验指标,接触半径和碰撞速度两因素对其影响都极显著;其次,研究了不同大豆种子体积对最大应力及最大位移的影响。在长度、宽度和厚度方向的撞击过程中,随着大豆种子体积的增大,撞击过程中最大应力都呈现先增大再减小的趋势;随着大豆种子体积的增大,撞击过程中最大位移都呈现线性增大的趋势。In view of the problem that mechanical damage of soybean seeds caused by the collision with mechanical components during the threshing process affects the seedling emergence,based on the statistical results of the parameters of Henong 60 variety,the finite element method was used to simulate the collision process of soybean seeds,and the changes of internal stress distribution and displacement deformation with time were analyzed.Firstly,the influence of collision velocity and contact radius on maximum stress and maximum displacement was analyzed by full factor test.The results showed that when the reliability level was 0.01,the contact radius and the collision velocity had significant influence on the maximum stress and maximum displacement test indexes.Secondly,the effects of different soybean seed volumes on maximum stress and maximum displacement were studied.It was found that during the impact in the direction of length,width and thickness,the maximum stress increased first and then decreased with the increase of soybean seed volume.With the increase of soybean seed volume,the maximum displacement increased linearly during the impinging process.

关 键 词：有限元法 大豆种子 碰撞模拟 全因素试验 

分 类 号：S223.2[农业科学—农业机械化工程]