摘要
为真实反映大豆脱粒装置工作过程中的物料运动,选取南夏豆25为研究对象,建立一种可破碎大豆植株离散元柔性模型,并对黏结参数进行标定。以茎秆破坏载荷(98.994 N)及位移(3.559 mm)为依据,通过Placket burman、最陡爬坡和Box-Behnken试验,对茎秆Bonding模型参数进行显著性筛选和寻优。结果表明,最优参数组合单位面积法向刚度、切向刚度、临界法向应力、临界切向应力和黏结半径比例分别为3.1277878×10^(9) N·m^(-3)、1.44e×10^(9) N·m^(-3)、2.657545×10^(6) Pa、1.26×10^(6) Pa、2.1。最后以籽粒损失率为指标,进行仿真与物理对比试验,验证模型准确性。建立大豆植株模型可为大豆脱粒机械研究提供参考。
To reflect more real soybean threshing devices in the process of material movement,south summer bean 25 was took as the research object,a discrete element could be broken soybean plants through building model,and the bonding parameter calibration.According to the stem failure load(98.994 N)and displacement(3.559 mm),significance screening and optimization of the parameters of the stem Bonding model were conducted by Placket burman test,steepest climb test and Box-Behnken test.The results showed that the ratios of the optimal parameter combination unit area normal stiffness,tangential stiffness,critical normal stress,critical tangential stress and bond radius were 3.1277878×10^(9) N·m^(-3),1.44×10^(9) N·m^(-3),2.657545×10^(6) Pa,1.26×10^(6) Pa,and 2.1,respectively.Finally,the accuracy of the model was verified by simulation and physical comparison tests with the grain loss rate as the index.The established soybean plant model provided references for the research of soybean threshing machinery.
作者
谭云峰
陈霖
胡森
王键
陈治帆
吕小荣
TAN Yunfeng;CHEN Lin;HU Sen;WANG Jian;CHEN Zhifan;LIU Xiaorong(School of of Mechanical and Electrical Engineering,Sichuan Agricultural University,Ya'an Sichuan 625014,China)
出处
《东北农业大学学报》
CAS
CSCD
北大核心
2023年第5期77-87,共11页
Journal of Northeast Agricultural University
基金
四川省科技厅重点研发项目(2021YFG0063)
国家现代农业产业技术体系四川豆类杂粮创新团队专项(SCCXTD-2022-20)。
关键词
离散元
大豆
植株建模:参数标定
discrete element
soybean
plant modeling
parameter calibration
