Imitating pangolin scale structure for reducing adhesion and resistance of rotary tillage in wet-adhesive soil

IF 6.1 1区 农林科学 Q1 SOIL SCIENCE
Fubin Zhang, Zhitao Luo, Enlai Zheng, Lei Han, Jin Qian, Haoping Yao, Yinyan Shi, Xiaochan Wang
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引用次数: 0

Abstract

The bionic design of soil-engaging components has recently received much attention in conservation tillage and is extremely important for reducing tillage resistance and increasing implement passability in wet-adhesive rice paddy soil. In this paper, to reduce adhesion and resistance of rotary tillage in wet-adhesive soil, a novel imitating pangolin scale structure is first proposed, and the bionic non-smooth surface parameters affecting the soil adhesion effect is clarified. Afterwards, based on the JKR attached Bonding contact model, an accurate discrete element interaction model of the designed rotary tillage blade -wet adhesive soil is established, and the effect of spindle speed, bump size and bump distance on the tillage resistance and soil disturbance is analyzed using the proposed model. Finally, the proposed imitating pangolin scale structure is optimized to improve the anti-adhesive and drag reduction properties using response surface method, furthermore, the corresponding model validation experiments and field tests are also conducted. Results reveal that the relative errors between the simulated and experimental values of the bionic blade rotary torque and soil adhesion mass are only respectively 4.4 % and 8.3 %. In addition, the optimal parameter combinations of anti-adhesion and drag reduction are also determined: the spindle speed is 180 rpm, the bump width is 10.6 mm and the bump distance is 17.9 mm, respectively, at the time, the effect of soil breaking of the designed blade is reduced by 9.95 % compared to that of the traditional blades but the effect of anti-adhesion and drag reduction is improved by 18.81 %.

模仿穿山甲的鳞片结构,减少湿粘性土壤中旋耕的附着力和阻力
近来,土壤参与部件的仿生设计在保护性耕作中备受关注,对于降低湿黏性稻田土壤的耕作阻力、提高机具通过性极为重要。本文首先提出了一种新颖的仿穿山甲鳞片结构,阐明了影响土壤附着效果的仿生非光滑表面参数,以降低旋耕在湿黏性土壤中的附着力和阻力。然后,基于 JKR 附着粘结接触模型,建立了所设计旋耕刀片与湿粘性土壤的精确离散元相互作用模型,并利用所建立的模型分析了主轴转速、凹凸尺寸和凹凸距离对耕作阻力和土壤扰动的影响。最后,利用响应面法对所提出的仿穿山甲鳞片结构进行了优化,以提高其抗粘减阻性能,并进行了相应的模型验证实验和田间试验。结果表明,仿生叶片旋转扭矩和土壤附着质量的模拟值与实验值的相对误差分别仅为 4.4 % 和 8.3 %。此外,还确定了防粘和减阻的最佳参数组合:主轴转速为 180 rpm,凸块宽度为 10.6 mm,凸块间距为 17.9 mm,此时,设计刀片的破土效果比传统刀片降低了 9.95%,但防粘和减阻效果提高了 18.81%。
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来源期刊
Soil & Tillage Research
Soil & Tillage Research 农林科学-土壤科学
CiteScore
13.00
自引率
6.20%
发文量
266
审稿时长
5 months
期刊介绍: Soil & Tillage Research examines the physical, chemical and biological changes in the soil caused by tillage and field traffic. Manuscripts will be considered on aspects of soil science, physics, technology, mechanization and applied engineering for a sustainable balance among productivity, environmental quality and profitability. The following are examples of suitable topics within the scope of the journal of Soil and Tillage Research: The agricultural and biosystems engineering associated with tillage (including no-tillage, reduced-tillage and direct drilling), irrigation and drainage, crops and crop rotations, fertilization, rehabilitation of mine spoils and processes used to modify soils. Soil change effects on establishment and yield of crops, growth of plants and roots, structure and erosion of soil, cycling of carbon and nutrients, greenhouse gas emissions, leaching, runoff and other processes that affect environmental quality. Characterization or modeling of tillage and field traffic responses, soil, climate, or topographic effects, soil deformation processes, tillage tools, traction devices, energy requirements, economics, surface and subsurface water quality effects, tillage effects on weed, pest and disease control, and their interactions.
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