Discrete element method simulation of disc type furrow openers in paddy soil  

作　　者：Fiaz Ahmad Baijing Qiu Qishuo Ding Weimin Ding Zahid Mahmood Khan Muhammad Shoaib Farman Ali Chandio Abdur Rehim Abdul Khaliq 

机构地区：[1]School of Agricultural Equipment Engineering,Jiangsu University,Zhenjiang 212013,Jiangsu,China [2]College of Engineering,Nanjing Agricultural University,Nanjing 210031,China [3]Department of Agricultural Engineering,Bahauddin Zakariya University 60800,Multan,Pakistan [4]Department of Farm Power and Machinery,Sindh Agricultural University,Tandojam 70060,Pakistan [5]Department of Soil Science,Bahauddin Zakariya University 60800,Multan,Pakistan [6]Department of Irrigation and Drainage,University of Agriculture,Faisalabad 38000,Pakistan

出　　处：《International Journal of Agricultural and Biological Engineering》2020年第4期103-110,共8页国际农业与生物工程学报（英文）

基　　金：The authors are grateful for the support of the Key Research and Development Project(2016YFD0200708);the Key Research and Development Project(Modern Agriculture)of Jiangsu Province,China(BE2017354);National Science and Technology Support Program(2018BAD08B04).

摘　　要：For granular materials,discrete element modeling is one of the best computer tools to simulate their behavior and interactions.A field experiment was carried out to evaluate the performance of disc furrow openers in paddy soil.Discrete element simulation was done to develop a 3D DEM model for notched,toothed and double disc furrow openers using EDEM software.Hertz Mindlin contact model with bonding was applied for simulation to fulfill the obligations of the soil moisture and bonding between the cohesive particles.Simulated and field experimental data were compared to determine the applicability in the different working conditions.The results of the simulation validated the applicability of the Hertz-Mindlin contact model with bonding to simulate the no till paddy soil using an extremely narrow tillage tool.The calibrated value of normal and shear stiffness was 5×10^(7)N/m,and the calibrated value of bond normal and shear strength was 3×10^(7)Pa.The relative error(-1.7%to 20.6%)for the double disc furrow opener was lower as compared with that notch typed(29.2%to 44.4%)and toothed type(31.5%to 45.9%)furrow openers.

关 键 词：soil tillage discrete element method discrete element modeling furrow opener paddy soil 

分 类 号：S15[农业科学—土壤学]