[Oral Presentation]考虑局部波动效应的颗粒材料中颗粒自旋波的传播分析与离散元模拟

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

考虑局部波动效应的颗粒材料中颗粒自旋波的传播分析与离散元模拟

ID：197 Submission ID：350 View Protection：ATTENDEE Updated Time：2024-04-30 10:25:11 Hits：466 Oral Presentation

Start Time：Pending （Asia/Shanghai）

Duration：Pending

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

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Abstract

针对现有颗粒材料微观力学本构模型中忽略颗粒运动局部波动行为的不足，考虑颗粒位移与转动间的耦合作用以及颗粒运动的局部波动特性，基于微观力学分析方法通过宏微观能量守恒以及均一化方法推导得到各向异性颗粒材料的微形态本构模型，并进一步分析不同摩擦系数、抗转动刚度、组构各向异性等条件下颗粒自旋波的频散特性和带隙特征。在此基础上，基于离散元方法模拟具有不同微结构的颗粒材料中自旋波的传播，并与理论预测结果进行对比分析。研究表明：① 颗粒材料中存在3类12种颗粒自旋波，包括3种纵波，6种横波和3种平面内剪切波。② 颗粒自旋波的截止波长与颗粒材料的微结构密切相关，规则排列颗粒材料中自旋波的截止波长最大。③ 对于由平均自旋产生的颗粒自旋波，当摩擦系数为0时，表现为声学波的正常频散，而当摩擦系数非0时，则表现为光学波的异常频散。④ 理论预测结果与数值模拟结果具有很好的一致性，验证了本构模型的可靠性。

Keywords

颗粒材料，局部波动，微观力学，自旋波，离散元，频散

Speaker

于鹏强

北京科技大学

Submission Author

于鹏强北京科技大学

刘洋北京科技大学

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