Determination and interpretation of parameters of double-bud sugarcane model based on discrete element

Abstract

Physical parameters of cane seeds are an important basis for the design calculation and simulation analysis of the seed meter. The accuracy of discrete element simulation depends on the discrete element parameters. In this study, based on the principle of energy conservation, discrete element parameters of cane-cane and cane-steel are experimentally studied by means of the inclined plane method and high-speed camera technology. The ranges of the static friction coefficient, rolling friction coefficient and restitution coefficient are obtained. In order to determine the discrete element simulation parameters, the Plackett-Burman test is used to evaluate six factors. Three significant factors of the cane-cane static friction coefficient, cane-cane rolling friction coefficient, and cane-steel restitution coefficient are selected. Then, the steepest climb test is used to approximate the optimal response region. Finally, the Box-Behnken response surface method is used to determine the values of three significant factors. It can be seen from the verification experiments that the optimized cane-cane static friction coefficient, cane-cane rolling friction coefficient, and cane-steel restitution coefficient are 0.19, 0.035, and 0.351, respectively. The repose angle under this parameters is 34.051° and the relative error is 2.7%. Therefore, the data accuracy is high. The experimental results can provide a theoretical basis for the design calculation and simulation analysis of the seed meter.