Structural design and optimization of crushing and strip-laying device based on discrete element method with wet-adhesive flexible straw model

IF 7.7 1区农林科学 Q1 AGRICULTURE, MULTIDISCIPLINARY

Computers and Electronics in Agriculture Pub Date : 2025-05-16 DOI:10.1016/j.compag.2025.110537

Fubin Zhang, Zhitao Luo, Weixun Li, Enlai Zheng, Dongchuan Pan, Jin Qian, Haoping Yao, Xiaochan Wang

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Abstract

In this paper, to improve the operational performance of crushing and strip-laying device in no-till planter, both the logarithmic helix curved shell and parabolic guide structures are first designed. Then, a lightweight discrete element particle model of flexible wet-adhesive rice straw is developed and the corresponding calibration method of contact model parameters is also proposed. Furthermore, a discrete element model of the whole straw-crushing and strip-laying device based on the JKR contact model is also established. It’s demonstrated that compared to the traditional straw model, the laying strip mass predicted by the developed straw model agrees better with experimental results. Moreover, the parabolic guide structure can reduce the variation coefficient of straw mass in the strip by 24.16 %, and the steady state flow of straw in the outlet area of the device is 0.205 kg/s. Finally, the response surface method is employed to determine the optimal crusher shaft speed (1617 rpm), inlet clearance (30 mm) and ground clearance (189 mm) of the straw-crushing and strip-laying device. A comparative analysis of bench test also reveals the optimization design can further reduce the variation coefficient of straw mass in the laying strip by 2.34 % and increase the cleanliness rate in the seed strip by 2.89 %.

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基于湿粘柔性秸秆模型离散元法的破碎铺条装置结构设计与优化

为了提高免耕播种机破碎铺条装置的工作性能，本文首先设计了对数螺旋曲面壳和抛物线导向结构。然后，建立了柔性湿粘稻草轻量化离散元颗粒模型，并提出了相应的接触模型参数标定方法。在此基础上，建立了基于JKR接触模型的全秸秆破碎铺条装置的离散元模型。结果表明，与传统秸秆模型相比，所建立的秸秆模型预测的铺层质量与实验结果吻合较好。采用抛物型导流结构可使秸秆在带材内的质量变异系数降低24.16%，秸秆在装置出口区域的稳态流量为0.205 kg/s。最后，利用响应面法确定了秸秆破碎铺条装置的最佳破碎机轴速（1617 rpm）、进口间隙（30 mm）和离地间隙（189 mm）。台架试验对比分析表明，优化设计可进一步降低铺料带秸秆质量变异系数2.34%，提高种带清洁度2.89%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Computers and Electronics in Agriculture 工程技术-计算机：跨学科应用

CiteScore

15.30

自引率

14.50%

发文量

800

审稿时长

62 days

期刊介绍： Computers and Electronics in Agriculture provides international coverage of advancements in computer hardware, software, electronic instrumentation, and control systems applied to agricultural challenges. Encompassing agronomy, horticulture, forestry, aquaculture, and animal farming, the journal publishes original papers, reviews, and applications notes. It explores the use of computers and electronics in plant or animal agricultural production, covering topics like agricultural soils, water, pests, controlled environments, and waste. The scope extends to on-farm post-harvest operations and relevant technologies, including artificial intelligence, sensors, machine vision, robotics, networking, and simulation modeling. Its companion journal, Smart Agricultural Technology, continues the focus on smart applications in production agriculture.