基于离散元法的生态茶园开沟抛土刀设计与参数优化  

Design and parameter optimization of trenching and soil-throwing blade for ecological tea garden by discrete element method

作　　者：陈伟祥 秦吉彪 陈重成 刘杨 郑书河[1,2] CHEN Weixiang;QIN Jibiao;CHEN Chongcheng;LIU Yang;ZHENG Shuhe(College of Mechanical and Electrical Engineering,Fujian Agriculture and Forestry University,Fuzhou,Fujian 350002,China;Modern Agricultural Equipment Engineering Research Center of Fujian Universities,Fuzhou,Fujian 350002,China)

机构地区：[1]福建农林大学机电工程学院,福建福州350002 [2]现代农业装备福建省高校工程研究中心,福建福州350002

出　　处：《福建农林大学学报（自然科学版）》2024年第1期136-144,共9页Journal of Fujian Agriculture and Forestry University:Natural Science Edition

基　　金：福建省科技厅引导性项目(2022N0009);福建农林大学茶全产业链创新与服务体系建设项目(K1520005A05)。

摘　　要：【目的】旨在设计一种用于生态茶园环境作业的开沟抛土刀。【方法】以正切面折弯角、抛土片面积、抛土片与侧切面夹角为试验因素,以功耗和区域抛土质量为评价指标,采用Box-Benknken中心组合设计法进行离散元仿真试验。【结果】(1)正切面弯折角、抛土片面积、抛土片与侧切面夹角3个因素对功耗和区域抛土质量的影响均显著。(2)仿真试验得出的最优参数组合:正切面弯折角112.7°,抛土片面积3566 mm^(2),抛土片与侧切面夹角132.5°。在最优参数条件下,功耗为1.121 kW,区域抛土质量为11.45 kg。(3)刀具功耗平均误差为12.25%,区域抛土质量平均误差为12.67%,说明该仿真模型较为可靠。【Purpose】The study aimed to design a trenching and soil-throwing blade applicable for ecological tea garden.【Method】Based on the dynamic analysis of blade during operation process and Box-Behnken central composite design,a discrete element simulation experiment was conducted with bending angle of front tangent plane,area of thrown up soil,and the angle between thrown up soil and side tangent plane as experimental factors to evaluate the quality of thrown up soil and power consumption.【Result】(1)Bending angle of front tangent plane,area of thrown up soil,and the angle between thrown up soil and side tangent plane all significantly affect power consumption and thrown up soil quality.(2)The optimal parameter combination(bending angle of front tangent plane at 112.7°,area of thrown up soil at 3566 mm^(2),and the angle between thrown up soil and side tangent plane at 132.5°)obtained from the simulation tests resulted in 11.45 kg of thrown up soil within the working range at the power consumption of 1.121 kW.(3)The average errors between the simulation tests and field trials were 12.25%and 12.67%for power consumption and quality of thrown up soil,respectively.【Conclusion】The simulation model was reliable for the manufacture of trenching and soil-throwing blade.

关 键 词：生态茶园 离散元仿真 正切面折弯角 抛土片面积 抛土片与侧切面夹角 

分 类 号：S224.1[农业科学—农业机械化工程]