DEM-based parameter optimization and tests of digging green onions

Fangyan Wang, Zhuchuan Qiu, Yongfei Pan, Guangquan Sun

Abstract


In view of the problems of easy damage and high digging resistance in the process of green onion harvesting, a mechanical model of digging green onions was established by taking the moment of digging and drawing green onions as the research object, and the main factors affecting the digging and harvesting effect were determined as the angle of digging, the dip angle of clamping carrier and the length of shovel. Thus, a complex simulation model of soil-green onion-digging mechanism system reflecting the state of harvesting was established, and the model was verified by testing soil compactness. The simulation tests were carried out by means of the complex simulation model of soil-green onion-digging mechanism system, making it clear that digging angle and the length of shovel have a extremely significant impact on the digging resistance, and the dip angle of the clamping carrier had a significant impact on the digging resistance. Through target optimization, the optimal combination of digging parameters was obtained, namely, the digging angle of 20°, the dip angle of clamping carrier of 25° and the shovel length of 70 mm, with the digging resistance of 1394 N at this moment. The field digging resistance test has showed that the average digging resistance is 1543 N with the average clamping damage rate of 1.27% and the average clamping loss rate of 0.44%, which can meet the requirements of green onion harvesting.
Keywords: harvesting, clamping force, digging resistance, discrete element method (DEM), simulation model, green onions
DOI: 10.25165/j.ijabe.20231604.7828

Citation: Wang F Y, Qiu Z C, Pan Y F, Sun G Q. DEM-based parameter optimization and tests of digging green onions. Int J Agric & Biol Eng, 2023; 16(4): 126–133 .

Keywords


harvesting, clamping force, digging resistance, discrete element method (DEM), simulation model, green onions

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References


Wang F Y. Scallion production technology and harvesting equipment. Agricultural Engineering, 2017; 7(5): 1-4. (in Chinese)

Kruggel-Emden H, Wirtz S, Scherer V. A study on tangential force laws applicable to the discrete element method (DEM) for materials with viscoelastic or plastic behavior. Chemical Engineering Science, 2008; 63(6): 1523-1541.

Ucgul M, Fielke J M. Saunders, C.3D DEM tillage simulation: Validation of a hysteretic spring (plastic) contact model for a sweep tool operating in a cohesionless soil. Soil and Tillage Research, 2014; 144(1): 220-227.

Song G Y, Liu Y H, Liu S, Lu W L. Analysis on mechanized harvesting technology of scallion. Agricultural Technology and Equipment, 2020; 9: 86-87. (in Chinese)

Hou J L, Chen Y Y, Li Y H, Wang W, Li G H. Development of quantitatively-laying and self-propelled green onion combine harvesters. Transactions of the CSAE, 2020; 36(7): 22-33. (in Chinese)

Wang C, Yang Y, Dou T X, Hou S, Hu G F. Theoretical and experimental study on digging resistance of scallion harvester. J Agricultural Mechanization Research, 2020; 42(9): 32-38. (in Chinese)

Liu Q C, Hou J L, Yuan J Q, Song L Z, Niu Z R. Development of virtual simulation training system for green chinese onion combine harvester. Agricultural Engineering, 2019; 9(12): 25-30. (in Chinese)

Li Q J, Min L Q, Sun Z M, Qin X T. Optimization design of 4CX-1 scallion harvester. Agricultural Equipment and Vehicle Engineering, 2013; 51(8): 63-67. (in Chinese)

Zhang J Q, Ren D M, Li Q J. Research on 4CX-1 scallion harvester. Agricultural Equipment and Vehicle Engineering, 2012; 50(9): 43-44, 51. (in Chinese)

Li Y, Liu W D. Simulation and analysis of single screw discrete element simulation based on EDEM software. Lifting and Transportation Machinery, 2017; 4: 78-81.(in Chinese)

Li H C, Li Y M, Tang Z, Xu L Z, Zhao Z. Numerical simulation and analysis of vibration screening based on EDEM. Transactions of the CSAE, 2011; 27(5): 117-121. (in Chinese)

Gao G H, Xie H F, Wang T B. EDEM simulation and experiment of pullout force of protected vegetable harvester. Transactions of the CSAE, 2017; 33(23): 24-31. (in Chinese)

Wu M C, Cong J L, Yan Q, Zhu T, Peng X Y. Calibration and experiments for discrete element simulation parameters of peanut seed particles. Transactions of the CSAE, 2020; 36(23): 30-38. (in Chinese)

Peng C W, Xu D J, He X, Tang Y H, Sun S L. Parameter calibration of discrete element simulation model for pig manure organic fertilizer treated with Hermetia illucen. Transactions of the CSAE, 2020; 36(17): 212-218. (in Chinese)

Shi L R, Zhao W Y, Sun W. Parameter calibration of soil particles contact model of farmland soil in northwest arid region based on discrete element method. Transactions of the CSAE, 2017; 33(21): 181-187. (in Chinese)

Hou J L, Wang H X, Niu Z R, Tang R, Li T H. Discrete element simulation and experiment of picking and clearing performance of garlic seed-picking device. Transactions of the CSAE, 2019; 35(24): 48-57. (in Chinese)

Yang J S. Research on key components of garlic harvester based on destructive innovation theory. Jinan: Jinan University, 2017; 55(6): 58-62. (in Chinese)

Liang R Q, Chen X G, Zhang B C, Wang X Z, Kan Z, Meng H W. Calibration and test of the contact parameters for chopped cotton stems based on discrete element method. Int J Agric & Biol Eng, 2022; 15(5): 1–8. doi: 10.25165/j.ijabe.20221505.6546.

Lv J T, Zhong E, Yang Y, Shang Q Q, Wu J E. Design and experimental analysis of 4U2A type double-row potato digger. Transactions of the C CSAE, 2015; 31(6): 17-24. (in Chinese)

Jia J X, Zhang D X, Hao X M, Liu H W. Parameter optimization and experimental analysis of potato digging shovel based on computer simulation. Journal of China Agricultural University, 2005; 5: 38-41. (in Chinese)

Wang F Y, Sun G Q, Shang S Q. Development of 4CL-1 self-propelled combine harvester for green onion. Transactions of the CSAE, 2019; 35(24): 39-47. (in Chinese)

GB7833-1987. Determination of forest soil water content. National Bureau of Standards, 1997.

Gao X F, Sun C, Bao S P. Study on improvement of ring knife method for determining soil field capacity. Ningxia Engineering Technology, 2017; 4: 347-349. (in Chinese)

Huang Y X, Hang C G, Yuan M C, Wang B T, Zhu R X. Discrete element simulation and experiment on disturbance behavior of subsoiling. Transactions of the CSAM, 2016; 47(7): 80-88. (in Chinese)

Wang X Z, Li P, He J P, Wei W Q, Huang Y X. Discrete element simulations and experiments of soil-winged subsoiler interaction. Int J Agric & Biol Eng, 2021; 14(1): 50–62. doi: 10.25165/j.ijabe.20211401.5447.

Dai F, Song X F, Zhao W Y, Zhang F W, Ma H J. Simulative calibration on contact parameters of discrete elements for covering soil on whole plastic film mulching on double ridges. Transactions of the CSAM, 2019, 50(2): 49-56, 77. (in Chinese)

Zheng K, He J, Li H W, Diao P S, Wang Q J, Zhao H B. Research on polyline soil breaking blade subsoiler based on subsoiling soil model using discrete element method. Transactions of the CSAM, 2016; 47(9): 62-72. (in Chinese)

MAK J, CHEN Y, SADEK M A. Determining parameters of a discrete element model for soil-tool interaction. Soil & Tillage Research, 2012; 118: 117-122.

LI Bo, Chen Y, Chen J. Modeling of soil-claw interaction using the discrete element method (DEM). Soil & Tillage Research, 2016; 158: 177-185.

Zhang R, Li J Q, Zhou C H, Xu S C. Simulation of dynamic behavior of soil ahead of the bulldozing plates with different surface configurations by discrete element method. Transactions of the CSAE, 2007; 23(9): 13-19. (in Chinese)

Gao G H, Xie H F, Wang T B. EDEM simulation and experiment of pullout force of protected vegetable harvester. Transactions of the CSAE, 2019; 35(23): 24-31. (in Chinese)

Yuan J, Li J G, Zou L L,Liu X M. Optimal design of spinach root-cutting shovel based on discrete element method. Transactions of the CSAM, 2020; 51(S2): 85-98. (in Chinese)

Fang H M, Ji C Y, Farman Ali Chandio, Guo J, Zhang Q Y, Chaudhry Arslan. Analysis of soil dynamic behavior during rotary tillage based on distinct element method. Transactions of the CSAM, 2016; (3): 22-28. (in Chinese)

Ma C, Qi J T, Kan Z, Chen S J, Meng H W. Operation power consumption and verification tests of a trenching device for orchards in Xinjiang based on discrete element. Int J Agric & Biol Eng, 2021; 14(1): 133–141. doi: 10.25165/j.ijabe.20211401.5477.

Wang X L, Hu H, Wang Q J, Li H W, He J, Chen W Z. Calibration method of soil contact characteristic parameters based on DEM theory. Transactions of the CSAM, 2017; 33(12): 78-85. (in Chinese)

Jia J X, Zhang D X, Sang Y Y, Yang X. Computer aided analysis and simulation experiment of potato digging blade. Transactions of the CSAE, 2006; 22(8): 106-110. (in Chinese)

Wang F Y. Optimization and field experiment of an adjustable device for sugar beet diggers. Int J Agric & Biol Eng, 2021; 14(6): 68–74.

Ahmad F, Qiu B J, Ding Q S, Ding W M, Khan Z M, Shoaib M, et al. Discrete element method simulation of disc type furrow openers in paddy soil. Int J Agric & Biol Eng, 2020; 13(4): 103–110. doi: 10.25165/j.ijabe.20201304.4800.




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