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

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

doi:10.13305/j.cnki.jts.2025.02.010

Journal of Tea Science >

2025 , Vol. 45 >Issue 2: 284 - 302

DOI: https://doi.org/10.13305/j.cnki.jts.2025.02.010

Research Paper

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

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

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1. School of Optoelectronics and Mechanical Engineering, Zhejiang Agriculture and Forestry University, Hangzhou 311300, China;
2. Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310008, China;
3. Zhejiang Kawasaki Tea Machinery Co., Ltd., Hangzhou 311121, China;
4. Tea Research Institute of Shandong Academy of Agricultural Sciences, Jinan 250100, China;
5. Horticultural Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530007, China;
6. National Engineering Technology Research Center of State Forestry and Grassland Administration on Forestry and Grassland Machinery for Hilly and Mountainous Areas, Hangzhou 311300, China;
7. Key Laboratory of Agricultural Equipment for Hilly and Mountainous Areas in South-Eastern China (Co-Construction by Ministry and Province), Ministry of Agriculture and Rural Affairs, Hangzhou 311300, China

Received date: 2024-10-24

Revised date: 2024-12-27

Online published: 2025-04-30

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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

Cite this article

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 . DOI: 10.13305/j.cnki.jts.2025.02.010

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