Bionic Nonsmooth Drag Reduction Mathematical Model Construction and Subsoiling Verification

Wu, Baoguang; Zhang, Ruize; Hou, Pengfei; Jin, Tao; Zhou, Deyi; Yu, Huaqing; Zhang, Qiang; Zhang, Jinsong; Xin, Yuelin

doi:10.1155/2021/5113453

Cited by 3 publications

(1 citation statement)

References 30 publications

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“…Using Engineering bionics theory, to get inspiration from the animal structures, is another approach to reducing the digging resistance and damage rate. These animal structures demonstrate a better crushing soil ability than the normal plane shovel [36][37][38][39][40][41][42]. Especially the soil burrowing animals, in order to adapt to their living conditions, after millions of years of evolution, have developed digging structures with excellent mechanical properties and delicate conformation.…”

Section: Bio-inspired Shovelmentioning

confidence: 99%

Development and Evaluation of Mechanical Harvesting of Root Crops and Its Performance Optimization

Gong¹,

Yang²

2023

Preprint

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Root crops grow in the soil deeply and bond with soil closely, which results in that the process of the separation between soil and root becomes the most difficult during the harvesting processes. In order to harvest root crops efficiently, the mechanical harvesting has become the main developing trend. However, high power and high damage rate are still occurred when mechanical harvester gets in touch with the roots. In this paper, we review the research of the development and evaluation of the mechanical harvesting of root crops and its performance optimization on the past years. The process of soil separation mainly consists in the initial separation between root and the ground and further separation between root and adhered soil. In general, the soil-cutting operation in the initial separation and the sieving mechanism in the further separation require high draught and power. And the dramatic friction, impact, pressure and so on, which happen in the components and soil-roots, are the key reasons to lead to root damage. The optimization of harvesting methods and parameters, including the digging shovel shape, working conditions, vibration, and screening way, is more significant in improving the harvesting performance. But there are still some limitations in the research and application of the mechanical harvester for root crops. Future research is suggested to focus on the development of the soil break-up when the digging shovel cutting soil, the insight into the interaction between soil and roots by different external compression loads, and the long-term studies to verify the high-efficiency and low-damage performances of mechanical harvester in practical application.

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Section: Bio-inspired Shovelmentioning

confidence: 99%

Development and Evaluation of Mechanical Harvesting of Root Crops and Its Performance Optimization

Gong¹,

Yang²

2023

Preprint

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A Comprehensive Study on the Mechanical Properties of Bulldozing Plate Soil Engaging Surface Based on the Entropy-Weighted Grey Relational Analysis Method

Guo

Zhang

2023

IEEE Access

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Drag reduction design and experiments for the chisel-shaped shovel tip

Wang,

Zheng,

et al. 2024

J Agric Eng

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To address the issue of high resistance encountered by traditional chisel-shaped shovel tips during tillage, this study drew inspiration from the micro V-shaped structures found in shark skin. Using laser cladding technology, a V-shaped wear-resistant coating was applied to the front surface of the shovel, with different drag-reducing V-shaped structures achieved by controlling the coating overlap ratio H (including 20%, 40%, and 60%). Additionally, the rear surface of the shovel tip was designed to mimic the V-shaped morphology of shark skin, proportionally amplified, and given a certain backward tilt angle θ to further reduce resistance. Through the discrete element simulation experiments while maintaining θ at 0°, it was found that the shovel tip achieved the best drag reduction effect when H was 40%. Based on this, the study varied the values of θ (including 0°, 1°, 3°, and 5°) while keeping H at 40%. Discrete element simulation experiments were conducted at depths of 250mm, 275mm, and 300mm to analyze the disturbance effect, fragmentation effect, and resistance of the shovel tip. Considering all factors, the shovel tip with θ of 5° was selected as the optimal choice. Finally, a soil trench experiment was conducted to verify the performance of the V-shaped shovel tip with H of 40% and θ of 5°, as well as the chisel-shaped shovel tip, in tillage operations. The experimental results showed good agreement with the simulation results, and the designed V-shaped shovel tip achieved a maximum drag reduction of 12.87%. This design provides valuable references for the structural optimization of subsoiler, contributing to the improvement of their performance and efficiency.

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Bionic Nonsmooth Drag Reduction Mathematical Model Construction and Subsoiling Verification

Cited by 3 publications

References 30 publications

Development and Evaluation of Mechanical Harvesting of Root Crops and Its Performance Optimization

Development and Evaluation of Mechanical Harvesting of Root Crops and Its Performance Optimization

A Comprehensive Study on the Mechanical Properties of Bulldozing Plate Soil Engaging Surface Based on the Entropy-Weighted Grey Relational Analysis Method

Drag reduction design and experiments for the chisel-shaped shovel tip

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