[Oral Presentation]柏拉图多面体颗粒水下坍塌滑动的启动时间研究

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

柏拉图多面体颗粒水下坍塌滑动的启动时间研究

ID：49 Submission ID：147 View Protection：ATTENDEE Updated Time：2024-04-09 22:09:50 Hits：388 Oral Presentation

Start Time：Pending （Asia/Shanghai）

Duration：Pending

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

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Abstract

本文利用格子波尔兹曼-离散单元法耦合模拟，研究了非球形柏拉图多面体颗粒水下堆积体滑动启动初期的动力学过程。结果表明，水下堆积体滑动的启动时间与颗粒形状直接相关。通过细致分析超孔隙水压力，体积分数等微观物理量，研究了柏拉图多面体在松散/密集状态下不同启动过程的内在力学机制。研究发现，由于非球形颗粒堆积体微观孔道内的不均匀性，导致了堆积体渗透性能远低于球形颗粒堆积体。非球形颗粒间的复杂互锁效应及接触网格的各向异性，使得堆积体的剪胀角随颗粒球形度的减小而增加。此外，由于非球形颗粒所受流体阻力与超孔隙流体的相互作用，使得柏拉图多面体堆积体的水下临界体积分数不同于干颗粒。最后，结合柏拉图多面体水下临界体积分数，剪胀角，渗透性及休止角等物理参数，提出了一个预测堆积体滑动时启动时间的数学模型，且与已有计算结果及实验结果吻合良好。

Keywords

水下堆积体,柏拉图多面体颗粒,启动时间,临界体积分数,渗透性

Speaker

钱业程

清华大学

Submission Author

钱业程清华大学

景路清华大学

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