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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.
Aiming at the dynamic destruction process of soil by the shovel-type hole-forming device, this paper proposes the discrete-element method to study the cavitation performance of the hole-forming device, and establishes the two-dimensional discrete element simulation model of the hole-forming device and the soil by applying a reasonable mechanical model Discrete element simulation analysis of the working process of the hole-forming device shows that the soil disturbance aggravates obviously and the return-flow coverage deteriorates with the increase of working speed. The soil reunion is obvious with the increase of soil water content, The fluidity is worse.The simulation results are compared with the theoretical analysis results, and the trend of the two is basically the same. Therefore, the feasibility of using the discrete element method to analyze the cavitation performance of the shovel-forming device is illustrated.