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<p>To address the issues of soil compaction and elevated subsoiling resistance stemming from soil salinization, a dual-shovel subsoiling approach that adheres to the subsoiling principle was put forward. In constructing the discrete element model, three types of soil particle models were developed according to the actual morphology of saline-alkali soil. Quantitative analyses of the static angle of repose and frictional inclination angle of the soil were conducted. The static repose angle and frictional inclination angle of the soil were simulated and analyzed using EDEM software. The contact parameters were validated through real-world experiments to establish an accurate soil model. A bionic deep loosening model was constructed by referencing the largest toe of the armadillo’s forefoot, utilizing its outer contour coordinates to define the edge curve of the solid structure. In this study, a tillage model was established using the coupling method of Multibody Dynamics—Discrete Element Method (MBD-DEM). The deep loosening mechanism of the bionic deep loosening shovel on saline-alkali soil under various assembly parameters was investigated. Results indicate that the peak values of surface soil particle force and soil disturbance effects occur at spacings of 300&#xa0;mm and 450&#xa0;mm. Experimental results fluctuated in accordance with variations in shovel spacing. Considering the unique characteristics of farming in saline-alkali land, the disturbance rate of each soil layer relative to the range of soil disturbances was evaluated. When the shovel spacing was 450&#xa0;mm, the soil disturbance range was 960.49&#xa0;mm, with the disturbance of upper soil particles accounting for 59.77%. Among all tested spacings, the 400&#xa0;mm shovel spacing demonstrated superior performance. This study provides fundamental data for assembling earth-touching components of agricultural machinery under Huang-Huai-Hai saline-alkali land working conditions and offers theoretical guidance for selecting optimal shovel spacing.</p>

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Soil disturbance experiment of double shovel in saline-alkali soil based on discrete element method

  • 期刊论文

  • 发表日期：

    2025年6月9日

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  • Jianchao Zhang,
  • Baochao Wang,
  • Dongwei Wang,
  • Xinya Wang,
  • Fengmei Li,
  • Xueguan Zhao,
  • Gang Dou,
  • Ning Jin,
  • Jianmin Du,
  • Haoran Bai

摘要

To address the issues of soil compaction and elevated subsoiling resistance stemming from soil salinization, a dual-shovel subsoiling approach that adheres to the subsoiling principle was put forward. In constructing the discrete element model, three types of soil particle models were developed according to the actual morphology of saline-alkali soil. Quantitative analyses of the static angle of repose and frictional inclination angle of the soil were conducted. The static repose angle and frictional inclination angle of the soil were simulated and analyzed using EDEM software. The contact parameters were validated through real-world experiments to establish an accurate soil model. A bionic deep loosening model was constructed by referencing the largest toe of the armadillo’s forefoot, utilizing its outer contour coordinates to define the edge curve of the solid structure. In this study, a tillage model was established using the coupling method of Multibody Dynamics—Discrete Element Method (MBD-DEM). The deep loosening mechanism of the bionic deep loosening shovel on saline-alkali soil under various assembly parameters was investigated. Results indicate that the peak values of surface soil particle force and soil disturbance effects occur at spacings of 300 mm and 450 mm. Experimental results fluctuated in accordance with variations in shovel spacing. Considering the unique characteristics of farming in saline-alkali land, the disturbance rate of each soil layer relative to the range of soil disturbances was evaluated. When the shovel spacing was 450 mm, the soil disturbance range was 960.49 mm, with the disturbance of upper soil particles accounting for 59.77%. Among all tested spacings, the 400 mm shovel spacing demonstrated superior performance. This study provides fundamental data for assembling earth-touching components of agricultural machinery under Huang-Huai-Hai saline-alkali land working conditions and offers theoretical guidance for selecting optimal shovel spacing.