数字农科院2.0

Discrete Element Model Building and Optimization of Tomato Stalks at Harvest

文献类型： 外文期刊

作者： Qimin Gao;Lei Cheng;Renbing Wang;Mingjiang Chen;Weisong Zhao;Jingjing Fu;Zhenwei Wang

作者机构：

关键词： discrete element method;mechanical property;parameter optimization;tomato stalk

期刊名称： Agriculture (Switzerland)

ISSN： 2077-0472

年卷期： 2024 年 14 卷 4 期

页码：

收录情况： SCIE（2024版）

摘要： The mechanical properties of tomato stalk, relevant to the harvesting and crushing of tomato vines, significantly impact its harvesting quality and efficiency. Establishing a simulation model, which accurately mirrors these properties, is foundational for designing related mechanical components. The discrete element method models tomato stalk harvesting and is optimized through mechanical tests and simulations. A blend of Plackett–Burman, steepest ascent, and central composite design modeling identified three contact model parameters influencing the maximum stalk shear force. The optimal values of these three parameters were a normal stiffness of 1.04 × 1010 N m−3, tangential stiffness of 7.59 × 109 N m−3, and bond radius of 1.06 mm. The relative error in the simulated versus measured shear force was <1%, affirming the model’s accuracy in characterizing cutting properties. These findings lay the theoretical groundwork for numerical simulations of tomato-stalk-related equipment.

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