[Oral Presentation]基于 DEM 的可破碎玉米芯建模方法与试验验证

Organized By

Hohai University

Monash University

Co-organized by

Southeast University

Jiangxi University of Science and Technology

Northeast University

DUT-BSU Scientific Research and Innovation Center

Suzhou University of Science and Technology

State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment

Sponsoring agency

KELI SDEM Software (Dalian) Co., Ltd.

Sugon Smart Computing Information Technology Co., Ltd.

Beijing Paratera Technology Co., Ltd.

Simpop Information Technology Co., Ltd.

Important Dates

Conference Announcement

December 2023, release First Round Announcement
Abstract Submission Deadline
March 31^th, 2024
Paper Submission Deadline
April 30^th, 2024
Registration
From January 1^st, 2024
Conference Schedule
May 31^st (Friday), 2024 On-Site Registration
June 1^st to 3^rd, 2024 Conference

基于 DEM 的可破碎玉米芯建模方法与试验验证

ID：31 Submission ID：69 View Protection：ATTENDEE Updated Time：2024-04-09 22:01:57 Hits：424 Oral Presentation

Start Time：Pending （Asia/Shanghai）

Duration：Pending

Session：[No Session] » [No Session Block]

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Abstract

建立能准确反映玉米芯力学特性的离散元数值模型是分析玉米芯在脱粒作业中破碎机理与运动规律的重要基础。本文针对现有玉米芯建模方法的通用性及适用性问题，测试分析了玉米芯的结构组成、几何特征及断裂行为。基于多球方法分别建立了木质层和芯髓最小组成单元DEM模型，并结合Hertz-Mindlin模型和Bonding模型提出了一种适用于不同行数和品种的可破碎玉米芯的通用建模方法。以18和20行玉米芯为例，测试、标定并优化了模型各组成部分之间的仿真参数。通过径向压缩试验及摆锤冲击试验对玉米芯建模方法及仿真参数进行了验证。仿真结果与试验数据对比误差低于10%，从准静态及动态角度综合验证了本文所提出的玉米芯建模方法的可行性和有效性。为准确模拟玉米脱粒过程中玉米芯群体的运动过程及力学行为奠定了基础。

Keywords

离散元法，玉米芯，建模方法，参数标定，力学试验

Speaker

钱露露

吉林大学

Submission Author

钱露露吉林大学

赵佳乐吉林大学

于建群吉林大学

王扬吉林大学

梁留锁吉林大学

于亚军吉林大学

Sponsored By

Hohai University

Panel of Computational Mechanics on Granular Materials, Working Party of Computational Mechanics, Chinese Society of Theoretical and Applied Mechanics

Jiangsu Society of Theoretical and Applied Mechanics