关键词: 数字化设计, 离散元法, 散粒物料, 播种机, 排种器

Abstract: While studying the flow course of granular materials and the interactions among granular materials and working parts of agricultural machinery based on the Discrete Element Method (DEM), a general method was presented to establish the DEM analyzing model of agricultural machine's working parts based on their CAD model. Based on this method, the integration of CAD software and DEM analyzing software was implemented for performance of agricultural machine's working parts by self-development, thereby an integrated analyzing and designing system was developed for precision seed metering devices of planters. Such contents were introduced as establishment of analysis model of precision seed metering devices, seeds generation, neighborhood search & contact detection, data transfer and software integration, etc.. Finally an application example validates the feasibility and function of the software.

Key words: digital design, discreteelement method, granular materials, planters, seed metering devices