为研究草鱼养殖饲料颗粒在调质过程中的运动规律和黏结状况，并优化饲料调质条件，开展了基于Hertz-Mindlin with JKR模型的草鱼养殖饲料颗粒EDEM仿真分析。首先，进行了草鱼饲料颗粒的离散元理论研究，并建立了调质颗粒的湿黏模型;其次，通过建立调质轴转速和桨叶安装角度两因素仿真对照组，分析了调质轴转速和桨叶安装角对饲料调质效果的影响;根据饲料调质特性需求，进行了转轴转速和桨叶安装角的最优搭配;并通过理论计算与仿真分析。结果显示，当调质器转轴转速n=250 r/min、桨叶安装角θ=30°时，草鱼饲料颗粒不易黏附腔体内壁，物料混合均匀，可获得最佳调质效果。研究表明，饲料调质器调质效果与桨叶安装角度和转轴转速密切相关。本研究可为饲料厂家生产不同种类饲料优化调质效果提供理论依据和参考。
Simulation analysis of feed conditioner characteristics based on the JKR model
An EDEM simulation analysis of Ctenopharyngodon idella feed pellets based on the Hertz-Mindlin with JKR model was carried out to study the movement and binding conditions of C.idella feed pellets during the conditioning process and optimize feed conditioning conditions.Firstly,a wet sticky model of feed pellets was established using the discrete element theory.Secondly,the impact of conditioning shaft rotational speed and impeller blade installation angle on feed conditioning effect was analyzed by establishing a simulation control group of two factors,conditioning shaft rotational speed and impeller blade installation angle.Then,according to the feed conditioning characteristics requirements,the optimal combination of shaft rotational speed and impeller blade installation angle was determined.Finally,the conclusion was reached through theoretical calculation and simulation analysis:when the conditioning machine's shaft rotational speed was 250 r/min and impeller blade installation angle was 30°,respectively.The feed pellets were not easily attached to the chamber wall,the materi-als could mix evenly,and the best conditioning effect could be obtained.The results indicated that the condition-ing effect of feed conditioner was closely associated with the blade installation angle and the rotational speed of the shaft.This study can offer a theoretical foundation and guidance for feed manufacturers in optimizing and improving conditioning effects.
JKR modelfeedshaft speedblade installation angleconditionerdiscrete element
国家科技期刊平台
NSTL
万方数据
