收稿日期:2021-04-08修回日期:2021-05-28第40卷第4期计算机仿真2023年4月文章编号:1006-9348(2023)04-0290-05基于SPH算法的深松铲破坏土壤仿真模型张志军,高奕珏(常州大学环境与安全工程学院,江苏常州214500)摘要:传统深松铲破坏土壤仿真模型存在土壤间作用力分析不够精准,无法确定深松铲作业的最佳入土深度。为此,构建基于光滑粒子流体动力学方法(SmoothedParticleHydrodynamics,SPH)算法的深松铲破坏土壤仿真模型。将深松铲破坏土壤过程分为剪切失效和切削失效,采用光滑粒子流体动力学方法,通过差值函数描述全部质点存在的相互作用,获取最佳光滑长度值。引入有限元分析方法,利用点-面形式构建土壤分析的耦合模型,确定土壤失效准则。利用此模型,分别探究铲尖与铲柄破坏土壤、刀面破坏土壤时深松铲受到的阻力情况。根据前铲与后铲对土壤的破坏作用,计算前后两铲对土壤的破坏半径及土壤扰动体积,完成深松铲破坏土壤的仿真模型构建。仿真结果证明,利用上述模型能够得出入土深度对土壤破坏的轮廓变化规律,可确定最佳入土深度,有效提高深松铲作业效果。关键词:光滑粒子流体动力学算法;深松铲;土壤破坏;仿真模型中图分类号:S222文献标识码:BSimulationModelofSoilDamagebySub-soilingshovelBasedonSPHAlgorithmZHANGZhi-jun,GAOYi-yu(SchoolofEnvironmental&SafetyEngineering,ChangzhouUniversity,ChangzhouJiangsu214500,China)ABSTRACT:Traditionally,thesimulationmodelcannotaccuratelyanalyzetheforcesbetweensoilsanddeterminethebestdepthintosoil.Therefore,asimulationmodelofsoildestroyedbysub-soilingshovelwasbuiltbasedonsmoothedparticlehydrodynamics(SPH)algorithm.Theprocessofsoilfailureincludesshearfailureandcuttingfail-ure.Accordingtothesmoothedparticlehydrodynamicsalgorithm,theinteractionbetweenparticleswasdescribedbythedifferencefunction,sothatthebestsmoothlengthwasobtained.Thefiniteelementanalysiswasintroduced.Andthecouplingmodelofsoilanalysiswasconstructedbycombiningpointandplanetodeterminethecriterionofsoilfailure.Basedonthismodel,weresearchedtheresistanceofsub-soilingshovelwhenthetineandhandleofshoveldestroyedthesoilandthetoolfacedestroyedthesoil.Accordingtothedamagingeffectoffrontshovelandbackshov-elonsoil,wecalculatedtheradiusandvolumeofthesoildestroyedbyfrontshove...
