基于离散元的鱼饲料仿真参数标定与试验  

Discrete element based calibration and test of simulation parameters for fish feed

作　　者：郭三琴 万鹏[1,2] 杨俊 邓志勇 汪帅帅 朱明 谭鹤群[1,2] GUO Sanqin;WAN Peng;YANG Jun;DENG Zhiyong;WANG Shuaishuai;ZHU Ming;TAN Hequn(College of Engineering,Huazhong Agricultural University,Wuhan 430070,China;Ministry of Agriculture and Rural Affairs Key Laboratory of Agricultural Equipment in Mid-Lower Yangtze River,Huazhong Agricultural University,Wuhan 430070,China)

机构地区：[1]华中农业大学工学院,武汉430070 [2]农业农村部长江中下游农业装备重点实验室,武汉430070

出　　处：《华中农业大学学报》2022年第6期286-295,共10页Journal of Huazhong Agricultural University

基　　金：国家重点研发计划项目(2018YFD0700903-2);湖北省农业科技创新中心2020年重大科技研发专项(2020-620-000-002-03);湖北省农业科技创新中心创新团队项目(2016620000001044);中央高校基本科研业务费专项(107-11041910103)。

摘　　要：为全面研究鱼饲料的离散元仿真物性参数,以渔用硬颗粒3.0中号饲料为研究对象,通过密度测量试验与单轴平板压缩试验测得硬颗粒饲料的密度、弹性模量、剪切模量、泊松比数值分别为1096 kg/m^(3)、336.32 MPa、126.65 MPa、0.33。同时在EDEM仿真软件中建立硬颗粒饲料离散元模型,结合台架试验与仿真试验对硬颗粒饲料-钢以及硬颗粒饲料-尼龙之间的碰撞恢复系数、静摩擦因数、滚动摩擦因数进行标定,其值分别为0.380、0.538、0.028,0.405、0.356、0.033。结合堆积角试验,通过最陡爬坡试验和Box-Behnken响应面优化试验,标定硬颗粒饲料间的碰撞恢复系数为0.364、静摩擦因数为0.236、滚动摩擦因数为0.13。运用自主研发的投饵机进行参数验证试验,以硬颗粒饲料分布变异系数CV为评价指标,得出实际硬颗粒饲料分布变异系数与仿真硬颗粒饲料分布变异系数的相对误差为1.709%,表明本研究中建立的渔用硬颗粒饲料的离散元模型以及标定的硬颗粒饲料物性参数可用于EDEM离散元仿真试验。The fishery hard pellet 3.0 medium feed was used to conduct the density measurement test and the uniaxial plate compression test to comprehensively study the physical parameters of fish feed discrete element simulation.The measured values of density,elastic modulus,shear modulus and Poisson´s ratio of hard pellet feed were 1096 kg/m^(3),336.32 MPa,126.65 MPa and 0.33,respectively.At the same time,the discrete element model of hard pellet feed was established with EDEM software.Combined with bench test and simulation test,the restitution coefficient,static friction coefficient and rolling friction coefficient between hard pellet feed-steel and hard pellet feed-nylon were calibrated.The values of them were 0.38,0.538,0.028,0.405,0.356,0.033,respectively.The restitution coefficient,static friction coefficient and rolling friction coefficient between hard pellet feeds were calibrated through stacking angle test,the steepest climbing test and Box-Behnken response surface optimization test.The values of them were 0.364,0.236,and 0.13,respectively.The self-developed baiting machine was used for the verification test of parameters.Taking the distribution variation coefficient of hard pellet feed as the evaluation index,the relative error of distribution variation coefficient between actual hard pellet feed and simulated hard pellet feed was 1.709%.It is indicated that the established discrete element model and the calibrated physical parameters of fishery hard pellet feed can be used for EDEM discrete element simulation test.

关 键 词：鱼饲料 颗粒饲料 离散元 本征参数 接触参数 标定 仿真参数 

分 类 号：S200.1[农业科学—农业工程] TH6[机械工程—机械制造及自动化]