[Oral Presentation]颗粒材料中应力波的超传递现象及其耗散机理

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

颗粒材料中应力波的超传递现象及其耗散机理

ID：128 Submission ID：126 View Protection：ATTENDEE Updated Time：2024-04-10 17:15:36 Hits：509 Oral Presentation

Start Time：Pending （Asia/Shanghai）

Duration：Pending

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

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Abstract

本文采用离散单元法研究了二维有序堆积颗粒材料中应力波的超传递现象，讨论了摩擦系数及预应力对频谱分布的影响，从颗粒尺度对应力波的耗散机理进行了阐述，并研究了结构对应力波耗散性能的影响。结果表明，考虑摩擦力时，四方堆积颗粒结构对特定频段的应力波具有优良的耗散性能；纵向预应力及摩擦系数对上禁带带宽及应力波耗散频段具有较大的调节能力；下禁带区域中，稳定后的速度响应频率与激励频率关联性较强，然而在上禁带区域中，则无明显关联。另外，周期激励的频率对首端颗粒速度响应幅值影响显著，首端颗粒的响应与激励的耦合在应力波的耗散过程中发挥着重要作用。四方堆积结构对应力波的耗散作用远超其他结构，且随摩擦系数的增加能量传递效率在部分频带出现了激增现象。研究结果将为颗粒材料的导波行为提供新见识。

Keywords

颗粒材料，离散元，应力波，超传递，禁带

Speaker

王喆

西南交通大学

Submission Author

王喆西南交通大学

王蕉西南交通大学

李翔宇西南交通大学

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