[Oral Presentation]离散元模拟循环三轴载荷下QH-E模拟月壤的动力学行为

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

离散元模拟循环三轴载荷下QH-E模拟月壤的动力学行为

ID：24 Submission ID：45 View Protection：ATTENDEE Updated Time：2024-04-09 22:00:19 Hits：473 Oral Presentation

Start Time：Pending （Asia/Shanghai）

Duration：Pending

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

No files

Abstract

模拟月壤是探月工程模型月壤试验的重要材料，其力学性能测试将直接影响钻探取样、月球着陆器、月球车等装置的设计。本文采用离散单元法研究了QH-E模拟月壤循环三轴载荷下动力学特性，讨论了循环次数、加载频率、波形、循环应力比和围压等因素对模拟月壤动力特性的影响。研究发现：随着循环次数的增加，轴向应变和动态模量先增大后趋于稳定。动态模量随着加载频率的增加而增加，而轴向应变减小。在相同的条件下，方波载荷可以产生比正弦波和三角波更大的轴向应变和更小的动态模量，更高的加载频率会导致更高的动态模量和更低的轴向应变，这些特性与实验测试的其他模拟月壤和沙土一致。阻尼比对围压和循环应力比不敏感，仅随围压的增加或循环应变比的降低略有下降。然而，围压对动态模量的影响取决于循环应力比的大小，它随着围压的增加可能增加也可能降低，表现出与其他月壤模拟物和砂土不同的动力学特性，同时也表明在循环三轴试验中考虑循环应力比的重要性。

Keywords

模拟月壤，离散元方法，动模量，阻尼比，循环三轴

Speaker

李云丽

武汉工程大学

Submission Author

李云丽武汉工程大学

杨振睿武汉工程大学

吴文平武汉大学

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