[Oral Presentation]球形物体在颗粒介质中贯入过程的数值模拟研究

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

球形物体在颗粒介质中贯入过程的数值模拟研究

ID：112 Submission ID：49 View Protection：ATTENDEE Updated Time：2024-04-10 17:11:17 Hits：435 Oral Presentation

Start Time：Pending （Asia/Shanghai）

Duration：Pending

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

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Abstract

采用离散单元法(DEM)模拟了球形物体在由球体或正多面体组成的密集颗粒介质中的贯入过程，分别考虑了固体体积分数恒定与压强恒定的颗粒环境。重点关注了颗粒介质的形状对贯入体阻力的影响。物体贯入固体体积分数恒定的颗粒床时，随着固体体积分数的增加会发生阻塞相变，同时伴随一系列临界现象，流动从惯性状态转变为弹性状态。发生阻塞相变的临界固体体积分数依赖于颗粒形状，基于该临界固体体积分数，提出了适用于不同形状颗粒介质中的贯入阻力归一化方程。在压强恒定的颗粒床中，观察到了不同颗粒介质中的流变现象，相对外接球直径较大的颗粒转动和平移会受到抑制。还提出了一个结合了局部接触和颗粒形状影响的归一化模型，用于预测不同贯入状态下的阻力。

Keywords

离散单元法，阻塞相变，贯入体，阻力模型，正多面体

Speaker

郝嘉辉

学生 浙江大学

Submission Author

郝嘉辉浙江大学

郭宇浙江大学

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