CAJ | 학술논문

针对土壤采用整体建模方法建模,木薯块根拔起过程动力学仿真精度受限及耕作层表土材料建模参数测定困难的问题,采用物理试验、FEM 和光滑粒子流体动力学方法 ( Smoothed particle hydrodynamics , SPH )的耦合方法,建立土壤硬度测试系统动力学仿真模型,对木薯种植地耕作层土壤建模材料参数弹性模量进行了反求.同时,建立了基于土壤分层的木薯块根拔起系统动力学仿真模型,且和采用整体建模方法建立的木薯块根拔起系统动力学仿真模型进行了精度比较. 结果表明:建模材料参数弹性模量的反求方法有效,基于土壤分层的木薯块根拔起系统动力学仿真模型精度高.
침대토양채용정체건모방법건모,목서괴근발기과정동역학방진정도수한급경작층표토재료건모삼수측정곤난적문제,채용물리시험、FEM 화광활입자류체동역학방법 ( Smoothed particle hydrodynamics , SPH )적우합방법,건립토양경도측시계통동역학방진모형,대목서충식지경작층토양건모재료삼수탄성모량진행료반구.동시,건립료기우토양분층적목서괴근발기계통동역학방진모형,차화채용정체건모방법건립적목서괴근발기계통동역학방진모형진행료정도비교. 결과표명:건모재료삼수탄성모량적반구방법유효,기우토양분층적목서괴근발기계통동역학방진모형정도고.
According to establish soil model using integral modeling method , the precision of dynamics simulation of cas-sava tuber lifting process was limited .And topsoil ' s material parameter on plough layer was difficult to determine .Dy-namics simulation model of soil hardness testing system was established .Physical test and coupling method of FEM and SPH were used in the model .Elastic modulus of soil on cassava planting field ' s plough layer was reversed .Dynamics simulation model of cassava tuber lifting system based on soil layering and integral modeling were built , respectively .And the precision between the two methods was compared .The results show that the reverse method is effective .The model based on soil layering has high precision .