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Determination of the coefficient of rolling friction of irregularly shaped maize particles by using discrete element method

引用

International Journal of Agricultural and Biological Engineering 2020年第2期13卷 15-25页

作者： Linrong Shi Wuyun Zhao Bugong Sun Wei Sun School of Mechanical and Electrical Engineering Gansu Agricultural UniversityLanzhou 730070China

The coefficient of rolling friction is a foundation parameter for conducting particles simulation,however,which of irregularly shaped maize seeds is difficult to ***,the coefficient of rolling friction between the simulation particles and the actual seeds is inconsistent due to the shaped difference of model and different position of gravity *** paper use two methods to determinate the coefficient of rolling friction based on discrete element method(DEM)and physical *** types of maize models from five different shaped maize samples(including horse-tooth shape,spherical cone shape,spherical shape,oblate shape,irregular shape)were developed with the help of slice modeling and 3D modeling *** cylinder container is used to arrange the simulation experiments of angle of repose with taking the coefficient of rolling friction as independent variables and the simulation angle of repose as target *** predicting detailed the coefficient of rolling friction(including horse-tooth shape,spherical cone shape,spherical shape,between horse-tooth shape and spherical cone shape,between horse-tooth shape and spherical shape,between spherical shape and spherical cone shape maize models),and forecasting a unified the coefficient of rolling friction among horse-tooth shape,spherical cone shape and spherical shape maize models,two types of materials(aluminum cylinder container and organic glass container)were used to validate the difference the angle of repose between the simulation maize models and actual maize *** show the relative error of the angle of repose between the maize models controlled by the coefficient of rolling friction through the detailed method and the actual maize seeds is 0.22%,0.33%in aluminum cylinder,organic glass container,*** relative error of the angle of repose between the simulation maize models controlled by the coefficient of rolling friction through the united method and a

关键词： coefficient of rolling friction maize irregularly shaped model angle of repose discrete element method

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