基于离散元法的移动式开沟器秸秆扰动规律研究

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中图分类号：S222.1 文献标识码：A 文章编号：2095-5553（2025）07-0012-09

Abstract：Toaddress theproblemofmobilefurrowopeners becoming blockedbystrawduring no-tilloperations，adiscrete element model was developed toanalyzetheinteractionsamong thefurowopener，straw，andsoilStraw displacementwas usedas the primaryevaluationindicator，andsinglefactorexperiments wereconductedtoexaminetheefectsof strawcovrage， operating spee，working depth，transversespacing，andlongitudinal spacingonthisindicator.Acolision model wasalso constructed tostudy forces betweensoilandstraw.Toevaluatethe furowopener'sdisturbanceeffectsonsoilatboth micro and microlevels，thecrossectionalareaandexcavationratewereusedasadditionaltestindicators.Theresultsshowed thatallexperimentalfactorssigniicantlyinfluencedstrawdisplacement，withhorizontaldisplacementbeingthemostaffected followedbylateralandverticaldisplacements.Thehorizontaldisplacementdecreasedwithincreasingstrawcoveragebut increasedconsistentlywithoperatingspeed.Itfirstdecreasedandthenincreasedwithgreatertransversespacingand workingdepth，anddecreasedwithincreasedlongitudinalspacing.Thevelocitydistributioncurveofsoilparticlescloselymatched boththearcof thecuttingbladeandthestraw’svelocitydistribution.Therelativeerorsinthecros-sectionalareaof the front and rear furrow openers were 2.48% and 5.2% ，respectively，while the relative errors in excavation rate were 0.27% and 5.14% ，respectively. These results providea theoretical foundation for optimizing thedesign of mobile furow openers to reduce blockages during no-tillfarming operations. Keywords：mobile furrow opener;no-tillsowing;discrete element simulation；straw displacement；soil disturbance

0 引言

在保护性耕作中，作物秸秆覆盖在地表，可以减少土壤流失、改善土壤结构，对生产效益和生态环境都有积极作用1。（剩余14658字）