基于LS-DYNA三七挖掘铲仿真分析及试验  

Simulation analysis and test of Panax notoginseng excavating shovel based on LS-DYNA

作　　者：解开婷 张兆国[1,2] 王一驰 唐金鑫 余小兰 XIE Kaiting;ZHANG Zhaoguo;WANG Yichi;TANG Jinxing;YU Xiaolan(School of Agriculture and Food,Kunming University of Science and Technology,Kunming 650500,China;Research Center on Mechanization Engineering of Chinese Medicinal Materials in Yunnan University,Kunming 650500,China)

机构地区：[1]昆明理工大学农业与食品学院,昆明650500 [2]云南省高校中药材机械化工程研究中心,昆明650500

出　　处：《东北农业大学学报》2021年第5期79-88,共10页Journal of Northeast Agricultural University

基　　金：国家自然科学基金项目(51865023)。

摘　　要：为解决三七收获过程中挖掘阻力过大问题,需深入研究挖掘铲三向阻力变化规律。采用MohrCoulomb屈服准则构建土壤有限元模型,建立挖掘铲力学模型,设计挖掘铲参数。运用LS-DYNA获取挖掘铲作用过程中三向阻力与土壤破碎形态开展土槽试验,以此验证仿真结果。结果表明,挖掘铲作业过程中X向阻力最大;Y向阻力与挖掘距离正相关;Z向阻力最小。仿真数据与试验数据规律一致,相对误差8.91%,仿真模型准确。In order to solve the problem of excessive excavation resistance in the harvest process of Panax notoginseng,it is necessary to study the variation law of three-direction excavation resistance.Mohr-Coulomb yield criterion was used to construct the soil finite element model,establish the mechanical model of excavating shovel,and designed the parameters of excavating shovel.LS-DYNA solver was used to simulate the excavating shovel operation process to obtain the three-way resistance,observed the soil fragmentation,and carried out soil tank test to verify the simulation results.The results showed that the resistance in X direction was the largest in the process of excavating and shoveling.Y direction resistance was positively correlated with excavation distance.Z direction had the least resistance.The simulation data were consistent with the experimental data,and the relative error was 8.91%.The simulation model was accurate.

关 键 词：三七挖掘铲 MOHR-COULOMB屈服准则 LS-DYNA 三向阻力 

分 类 号：S225.7[农业科学—农业机械化工程]