基于DEM-MBD耦合算法的茶园仿生掘耕机优化与试验

Abstract

Abstract: To solve the problems of high resistance and poor operation efficiency caused by soil compaction and stickiness in tea plantation cultivation, this study designed a tea plantation composite biomimetic tillage shovel based on the mole claw toe as a biomimetic prototype, and integrated it with a four-bar mechanism to develop a tea garden tillage machine. Firstly, a simulation analysis of the tillage process of a tea garden bionic tillage shovel was carried out based on the coupling algorithm of Discrete Element Method (DEM) and Multi Body Dynamics (MBD). At the same time, Design Expert 13 experimental design software was used to design and carry out a three-factor three-level simulation orthogonal combination experiment. It was found that when the tillage depth was 100 mm, the optimal working parameters of the tea garden biomimetic tillage machine with a composite biomimetic tillage shovel were the plowing shovel insertion angle of 33.506°, the driving arm speed of 289.923 r·min^-1, and the tillage machine forward speed of 0.2 m·s^-1. Subsequently, a comparative analysis of soil disturbance simulation based on soil particle velocity distribution was conducted under these working parameters. Finally, a comparative experiment was conducted in tea gardens using a composite biomimetic tillage shovel and a prototype shovel under the same working parameters. The results show that compared with the prototype shovel, the average resistance of the tea garden biomimetic tillage machine equipped with a composite biomimetic shovel was reduced by 5.70%, and the performance evaluation indicators such as soil fragmentation rate were improved. Its working performance can meet the requirements of tea garden cultivation.

Key words: tea garden tillage machine, discrete element method, multibody dynamics, coupling algorithm, biomimetic structural design

CLC Number:

JIA Zhijun, JIANG Jiayin, XU Jiajun, LI Yang, DONG Chunwang, SONG Wentao, LI Kai, WEI Chizhang, YAO Yuchen, YAO Lijian, YANG Zidong, LIU Haoyang, MA Rong. Optimization and Testing of Tea Garden Biomimetic Tillage Machine Based on DEM-MBD Coupling Algorithm[J]. Journal of Tea Science, 2025, 45(2): 284-302.

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Optimization and Testing of Tea Garden Biomimetic Tillage Machine Based on DEM-MBD Coupling Algorithm

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