塑相水田土壤参数对履带式拖拉机行驶性能的影响  

Impact of soil physical properties on the driving performance of a tracked tractor on paddy soils in the plastic state

作　　者：曹明 龙祖熙 王永维[1] 潘宇轩 王俊[1] CAO Ming;LONG Zuxi;WANG Yongwei;PAN Yuxuan;WANG Jun(College of Biosystems Engineering and Food Science,Zhejiang University,Hangzhou 310058,China)

机构地区：[1]浙江大学生物系统工程与食品科学学院,杭州310058

出　　处：《浙江大学学报（农业与生命科学版）》2022年第1期125-134,共10页Journal of Zhejiang University:Agriculture and Life Sciences

基　　金：国家重点研发计划课题(2016YFD0700601);国家水稻产业技术体系项目(CARS-01-49);浙江大学大北农学科发展和人才培养基金。

摘　　要：为了探明塑相水田土壤参数、行驶速度对履带式水田拖拉机行驶性能的影响,获得较佳的作业条件,利用多体动力学软件RecurDyn建立了水田土壤力学模型和履带式水田拖拉机物理模型,并以行驶阻力、下陷深度为试验指标,以土壤黏粒含量、含水量、密度以及行驶速度为试验因素,采用四因素五水平二次正交组合方法进行仿真试验。结果表明:行驶阻力与土壤黏粒含量、含水量呈正效应,与土壤密度、行驶速度呈负效应,影响的主次关系为土壤含水量、行驶速度、土壤密度、土壤密度与黏粒含量的交互作用;下陷深度随着土壤含水量增加而增加,随着土壤黏粒含量、密度和行驶速度的增加而降低,影响的主次关系为土壤含水量、密度、黏粒含量以及黏粒含量与含水量交互作用、黏粒含量与行驶速度交互作用、含水量与行驶速度交互作用。总之,本研究建立了履带式水田拖拉机行驶阻力、下陷深度与土壤黏粒含量、含水量、密度以及行驶速度间的关系模型;依据水田土壤黏粒含量、密度等参数,利用该模型能够优化获得行驶阻力最小值时的水田土壤含水量和拖拉机行驶速度。To investigate the impact of soil physical properties and driving velocity on the driving performance of a tracked tractor and obtain better operating conditions on paddy soils in the plastic state,a paddy soil mechanical model and a tracked tractor physical model were established using the RecurDyn,a multi-body dynamics software.The method of the quadratic orthogonal rotating combination design of four factors and five levels was applied to determine the impacts of clay content,moisture content,density of soils and driving velocity on the driving resistance and subsidence depth.The modeling results indicated that the driving resistance was positively associated with clay content and moisture content of soils,but negatively associated with soil density and driving velocity.The contribution rates of the factors to the driving resistance from high to low followed the order as soil moisture content,driving velocity,soil density,and soil density combined with soil clay content.The subsidence depth increased with greater soil moisture content but decreased with higher soil clay content,soil density,and driving velocity.The contribution rates of the variables to subsidence depth were ordered as soil moisture content,soil density,soil clay content,clay content combined with moisture content,clay content combined with driving velocity,and moisture content combined with driving velocity.Overall,this study quantifies the relationships among soil clay content,soil moisture content,soil density,driving velocity and driving resistance,subsidence depth of a tracked tractor using the modeling approach;and according to the soil clay content and density,the model can be used to optimize the soil moisture content and driving velocity when the driving resistance is minimum.

关 键 词：土壤参数 履带式拖拉机 行驶速度 行驶阻力 下陷深度 

分 类 号：S22[农业科学—农业机械化工程]