农业机械学报2025，Vol.56Issue(11)：146-155,10.DOI:10.6041/j.issn.1000-1298.2025.11.013
基于逆向工程的羊草种子离散元模型构建与参数标定
Reverse Engineering-based Discrete Element Model Construction and Parameter Calibration for Leymus chinensis Seeds
摘要
Abstract
Aiming to enhance the accuracy and fidelity of the discrete element model(DEM)for Leymus chinensis seeds,and provide a reliable model basis for the design and optimization of seed metering systems and critical components,focusing on the construction of a high-fidelity discrete element model and the calibration of contact parameters for Leymus chinensis seeds,utilizing reverse engineering techniques,a realistic geometric model of Leymus chinensis seeds was developed.Subsequently,by employing the Hentz-Mindlin(no slip)particle contact model and the single-sphere filling method,the discrete element simulation model was established.Intrinsic mechanical properties,including triaxial dimensions,thousand-seed weight,bulk density,elastic modulus,and Poisson's ratio were measured.Collision recovery coefficients and rolling friction coefficients between the Leymus chinensis seeds and PLA plastic plates,as well as Q235 steel plates,were calibrated by using collision tests and inclined plane rolling tests,respectively.Furthermore,critical contact parameters,including the inter-seed collision recovery coefficient,static friction coefficient,and rolling friction coefficient,were identified and optimized by using the steepest ascent experiments followed by a quadratic orthogonal rotation design.Subsequently,these calibrated parameters were validated through bench tests.The results indicated that the discrepancy in seed metering mass flow rate between the simulation and bench tests was less than 3％,and the difference in the coefficient of variation for seed metering quantity per row was less than 5％.The findings can provide a foundational model and parameter support for the simulation analysis of the Leymus chinensis seed metering process and the structural optimization of seed metering devices.Moreover,it further demonstrated the good applicability and high accuracy of the three-dimensional discrete element model of seeds constructed by using reverse engineering techniques.关键词
羊草种子/离散元/接触参数/参数标定/3D扫描Key words
Leymus chinensis seeds/discrete element/contact parameters/parameter calibration/3D scanning分类
农业科技引用本文复制引用
贺长彬,杜超宇,王超,吴美红,叶元文..基于逆向工程的羊草种子离散元模型构建与参数标定[J].农业机械学报,2025,56(11):146-155,10.基金项目
内蒙古自治区高等学校青年科技英才支持计划项目(NJYT24046)、内蒙古自治区直属高校基本科研业务费项目(BR220506)、国家自然科学基金项目(52465032)、内蒙古自治区自然科学基金项目(2024LHMS05001)、内蒙古自治区一流学科科研专项项目(YLXKZX-NND-046)和内蒙古自治区科技计划项目(2022YFDZ0019) （NJYT24046）
