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Determination of the draft force for different subsoiler points using discrete element method

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International Journal of Agricultural and Biological Engineering 2016年第3期9卷 81-87页

作者： Li Bo Xia Rui Liu Fanyi Chen Jun Han Wenting Han Bing College of Mechanical and Electronic Engineering Northwest A&F UniversityYangling712100China

Generally,a subsoiler is comprised of a shank and a *** point shape has a significant effect on the draft force of a *** this study,the draft force of subsoilers with four different points were compared under the speed of 0.8 m/s and the depth of 350 mm in the soil *** Element Method(DEM)was applied in simulating the working process of the *** stiffness of soil particles used in DEM was calibrated by comparing the simulated draft force of a standard arc-shaped subsoiler with the *** calibrated soil particle stiffness was 1.1×104 N/*** validated model was then used to compare the draft force of subsoilers with four different points under the same condition in the *** showed that different points would cause different draft *** subsoiler with short chisel point caused the smallest draft force(2885 N)while the point with short face and wings had the largest force(4474 N).The relative errors of the simulated results were less than 4%,which proved that DEM was an effective way for predicting the draft force of *** velocity field and contact force filed could show the movement of soil around the subsoiler.

关键词： subsoiler point shape draft force chisel point DEM conservation tillage

Simulation and experimental study on drag reduction and anti-adhesion of subsoiler with bionic surface

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International Journal of Agricultural and Biological Engineering 2022年第4期15卷 57-64页

作者： Jiping Niu Tongyun Luo Jiaqing Xie Haoxuan Cai Zhikang Zhou Jun Chen Shuo Zhang College of Water Resources and Architectural Engineering Northwest A&F UniversityYangling 712100ShaanxiChina College of Mechanical and Electronic Engineering Northwest A&F UniversityYangling 712100ShaanxiChina

A new subsoiler with placoid scale microstructure bionic surface was proposed which mimicked shark skin to reduce tillage resistance and soil adhesion during subsoiling *** contour curves of placoid scale microstructure on shark skin were fitted,and two kinds of bionic subsoiler with continuous and discontinuous microstructures were designed and fabricated,*** effects of different bionic surfaces on tillage resistance were investigated by finite element simulation and *** results indicated that the bionic subsoiler with discontinuous microstructure reduced the horizontal and vertical force by 21.3%and 24.8%,*** subsoiler with discontinuous microstructure surface can prevent the adhesion between the soil and subsoiler surface more efficiently.

关键词： drag reduction anti-adhesion subsoiler bionic surface placoid scale microstructure finite element simulation

Overview of Current Research Situations of subsoiler

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Asian Agricultural Research 2014年第8期6卷 93-97,100页

作者： Shengbao GAN Xirui ZHANG Yue LI Mechanical and Electrical Engineering College Hainan University

Modern subsoiling technology is a little ploughing measure in dry land protective farming technology *** subsoiler can scarify soil,deepen the arable layer,break the plough layer,improve the soil permeability,increase soil infiltration speed and amount,and create an arable layer structure with coexistence of fictional and real ***,it can effectively promote development and growth of crop root system and play a favorable role in drought resistance and yield increase of *** paper made a simple overview of the subsoiling technology,current development situation of subsoiler both at home and abroad,and classification of subsoilers.

关键词： Protective farming subsoiler Development and growt

Tillage force and disturbance characteristics of different geometric-shaped subsoilers via DEM

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Advances in Manufacturing 2020年第3期8卷 392-404页

作者： Jin Tong Xiao-Hu Jiang Yue-Ming Wang Yun-Hai Ma Jun-Wei Li Ji-Yu Sun Key Laboratory of Bionic Engineering Ministry of EducationJilin UniversityChangchun130022People’s Republic of China College of Biology and Agricultural Engineering Jilin UniversityChangchun130022People’s Republic of China College of Mechanical and Electrical Engineering Shihezi UniversityShihezi832000XinjiangPeople’s Republic of China

With the increased use of agricultural machinery in field operations,soil compaction has become increasingly severe,and the plough pan has become *** is an excellent way to address this ***,it is limited by high energy consumption,which is closely related to tillage *** investigate the effect of the geometric shape of shanks and tines on tillage force and soil disturbance in loam,a layered soil model in accordance with the actual conditions was established and five different subsoilers were simulated via discrete element *** results indicated that the shank impacted soil disturbance and tine impacted tillage *** draft force of curved shank and chisel tine was 8%less than that of the straight shank and sweep *** straight shank and sweep tine produced a larger furrow profile and a higher furrow *** subsoiler with curved shank and chisel tine(C-C)exhibited the lowest specific resistance(12.87,17.52,19.46 and 21.18 kN/m^2 in the 30,35,40 and 45 cm tillage depth,respectively)considering the draft force and soil disturbance ***,these results will facilitate in the selection of a suitable subsoiler and design of new subsoilers with lower energy consumption requirements for loam areas worldwide.

关键词： subsoiler Discrete element method(DEM) Tillage force Soil disturbance Soil compaction