基于DEM-MBD耦合的马铃薯排种性能提升研究OA北大核心

To address the problems of irregular shape and poor mobility of cut potatoes used for sowing,which lead to dif-ficulties in seed filling and poor seed discharge,a simulation analysis was carried out on the basis of measuring the material characteristics of cut potatoes,and the mechanism of improving seed discharge performance by adding an eccen-tric seed lifting device was clarified.On the basis of this,a quadratic regression orthogonal rotating combination bench test was carried out with sowing speed,seed layer height and eccentric seed lifting device speed as the test factors,and the pass index,heavy seed index and seed leakage index as the test indicators,and a regression model for the three indicators was established.The model was used to optimise the working parameters of the seed raiser.The test results showed that:the main order of the qualifying index of the seed raiser was the rotational speed of the eccentric seed lifting device,the seed layer height and the sowing speed;the best performance was achieved when the sowing speed was 1.986 km/h,the rotational speed of the eccentric seed lifting device was 41.91 r/min and the seed layer height was 177.549 mm.The qualification index was 91.21%,the omission index was 2.02%,the replanting index was 6.76%,meeting the require-ments of potato cultivation.