铲式成穴器成穴性能的离散元法仿真  

Simulation analysis of cavitation performance for spade soil opener based on discrete element method

作　　者：纪玉杰[1] 于淼[1] 李成华[1] 

机构地区：[1]沈阳理工大学机械工程学院,辽宁沈阳110159

出　　处：《江苏大学学报（自然科学版）》2014年第1期40-43,86,共5页Journal of Jiangsu University：Natural Science Edition

基　　金：国家自然科学基金资助项目(51075282);国家科技支撑计划项目(2012BAH32F02)

摘　　要：针对铲式成穴器对土壤的动态破坏过程,提出采用离散元法研究成穴器的成穴性能.建立了成穴器与土壤的二维离散元仿真分析模型,通过施加合理的力学模型进行成穴器工作过程的离散元仿真分析.由仿真结果可知:随着工作速度的加快,土壤的扰动明显加剧,回流覆盖效果变差;随着土壤含水率的增加,土壤的团聚现象明显,土壤流动性变差.将仿真计算结果与理论分析结果对比,两者的变化趋势基本一致,由此初步说明了采用离散元法分析铲式成穴器成穴性能的可行性.The cavitation performance of spade soil opener was investigated by discrete element method （DEM） to discuss the soil dynamic breaking process of spade soil opener. The twodimensional DEM analy zing models of soil opener and soil granules were built respectively. The working process of the soil opener was simulated based on the proposed twodimensional DEM analyzing models through a reasonable mechanical model. The simulation results show that with the increasing of working speed, the disturbance of soil increases obviously with worse backflow covering effect of soil. With the increase of soil moisture content, the soil reu nion phenomenon becomes obvious with decreased soil liquidity. The simulation results are consistent with those of theoretical analysis. It is feasible to analyze the performance of spade soil opener by the proposed DEM.

关 键 词：铲式成穴器 成穴 仿真分析 土壤 离散元 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]