基于SPH算法的深松铲土壤切削过程仿真及试验研究  

Simulation and Experimental Study of Soil Cutting Process by Subsoiler Based on SPH Method

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作  者:曹中华 崔晋波[1] 湛小梅[1] 李亚丽[1] 王圆明[1] 余雪源 刘汶树 宋树民[1] Cao Zhonghua;Cui Jinbo;Zhan Xiaomei;Li Yali;Wang Yuanming;Yu Xueyuan;Liu Wenshu;Song Shumin(Chongqing Academy of Agricultural Sciences,Chongqing 401329,China)

机构地区:[1]重庆市农业科学院,重庆401329

出  处:《农机化研究》2019年第7期28-34,41共8页Journal of Agricultural Mechanization Research

基  金:重庆市基本科研项目(2016cstc-jbhy-00521);科研院所绩效激励引导专项(cstc2017jxj18004,cstc2017jxjl80046).

摘  要:为探明深松铲土壤切削过程中切削阻力的变化规律和了解深松铲切削土壤过程情况,基于SPH方法建立了深松铲土壤深松的有限元模型,并对其深松过程进行仿真分析。仿真结果表明:SPH法能够直观地模拟深松铲土壤切削完整过程,最大等效应力为3.184MPa,主要集中在与深松铲接触土壤上,仿真切削阻力为3.65kN。通过耕整地移动式田间动态试验台进行田间试验验证,得出切削阻力为3.542kN,与仿真结果相比误差仅为3.05%,验证了基于SPH法进行深松铲切削土壤过程的仿真是可行的。In order to investigate the variation rule of cutting resistance and understand the condition on soil cutting process by subsoiler.In this paper,the finite element model of soil-subsoiler was constructed by using the method of smooth particle hydrodynamics(SPH),and the soil cutting process by subsoiler was simulated and analyzed.Simulation result showed that SPH method could visually simulate the soil cutting process by subsoiler,the maximum Von Mises stress was 3.184MPa and focused on the soil touching with subsoiler,and cutting resistance was 3.5422kN.A field test was done by using mobile field dynamic test rig on soil preparation,the cutting resistance is 3.65kN,which is 2.95%compared with the simulation results.It shows that the simulation is accutate within the allowable range of error.

关 键 词:深松铲 土壤 切削 SPH 仿真 试验台 

分 类 号:S222[农业科学—农业机械化工程;农业科学—农业工程] S126

 

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