离散元法在农业工程领域的应用进展  

Application Progress of Discrete Element Method in Agricultural Engineering

作　　者：贺一鸣[1,2] 吴明亮[1,2,3] 向伟[1,2,3] 颜波[1,2] 王加跃 包攀峰 He Yiming Wu Mingliang Xiang Wei Yan Bo Wang Jiayue Bao Panfeng(Collage of Engineering, Hunan Agricultural University, Changsha 410128 Southern Regional Collaborative Innovation Center for Grain and Oil Crops in China, Changsha 410128 Hunan Province Modern Agricultural Equipment Engineering Technology Research Center, Changsha 410128)

机构地区：[1]湖南农业大学工学院,长沙410128 [2]南方粮油作物协同创新中心,长沙410128 [3]湖南省现代农业装备工程技术研究中心,长沙410128

出　　处：《中国农学通报》2017年第20期133-137,共5页Chinese Agricultural Science Bulletin

基　　金：湖南省科技厅重点项目"南方稻田油菜机械化起垄栽培技术研究与示范"(2016NK2105);湖南省科技厅平台建设项目"湖南省现代农业装备工程技术中心"(湘财教指[2014]10号);湖南省研究生科研创新项目"移栽油菜成孔器成孔机理及装备研究"(CX2016B286);湖南省政府重大专项"湖南双季稻区油菜早熟品种选育和机械化生产技术研究与生产示范机械化生产部分"(湘府阅[2014]35号)

摘　　要：简述了离散元法在农业工程领域方面的研究成果,根据离散元法在农业工程领域的不同应用,分别讨论了离散元法在土壤散体颗粒、农业物料颗粒、多相流中单相介质的应用研究现状,指出了存在数量级受限,颗粒模型不精准,复杂工况制约等问题。提出今后离散元法的研究趋势:开发农业工程领域的专用离散元软件,提高颗粒群的运算效率;通过准确获取物料的细观参数,从理论基础上完善接触模型,使仿真颗粒与真实颗粒更为接近;通过离散元法软件与其他软件耦合,结合API的二次开发,拓宽离散元法在复杂散体颗粒运动仿真的应用。This paper introduced the research results of discrete element method in agricultural engineenng field. According to different application aspects, the authors discussed the application progress of discrete element method in soil grain, agricultural particle material, single medium in muhiphase flow, respectively, and pointed out existing problems, like the limited magnitude orders, inaccurate particle model, complicated work condition, etc. Then, the authors proposed future research trend of discrete element method： developing professional discrete element method software for agricultural to improve efficiency of the operation of particle group; perfecting contact model at the theoretical basis to make simulated and real particle more close; coupling discrete element method with other software with the combination of API secondary development, to broaden the application of discrete element method in particles complex movement.

关 键 词：离散元法 农业工程 应用进展 仿真 接触模型 

分 类 号：S23-0[农业科学—农业机械化工程]