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可破碎颗粒体在动力载荷下的耗能特性

祁原 黄俊杰 陈明祥

祁原, 黄俊杰, 陈明祥. 可破碎颗粒体在动力载荷下的耗能特性[J]. 力学学报, 2015, 47(2): 252-259. doi: 10.6052/0459-1879-14-145
引用本文: 祁原, 黄俊杰, 陈明祥. 可破碎颗粒体在动力载荷下的耗能特性[J]. 力学学报, 2015, 47(2): 252-259. doi: 10.6052/0459-1879-14-145
Qi Yuan, Huang Junjie, Chen Mingxiang. ENERGY DISSIPATION CHARACTERISTICS OF CRUSHABLE GRANULES UNDER DYNAMIC EXCITATIONS[J]. Chinese Journal of Theoretical and Applied Mechanics, 2015, 47(2): 252-259. doi: 10.6052/0459-1879-14-145
Citation: Qi Yuan, Huang Junjie, Chen Mingxiang. ENERGY DISSIPATION CHARACTERISTICS OF CRUSHABLE GRANULES UNDER DYNAMIC EXCITATIONS[J]. Chinese Journal of Theoretical and Applied Mechanics, 2015, 47(2): 252-259. doi: 10.6052/0459-1879-14-145

可破碎颗粒体在动力载荷下的耗能特性

doi: 10.6052/0459-1879-14-145
基金项目: 岩土与结构工程湖北省重点实验室开放课题(HBKLCIV201207), 武汉大学自主科研项目课题(2042014KF0007) 和国家重点基础研究发展计划(973 计划) 子课题(2014CB046902) 资助项目
详细信息
    通讯作者:

    陈明祥,教授,主要研究方向:固体力学.E-mail:mxchen@whu.edu.cn

  • 中图分类号: TU43

ENERGY DISSIPATION CHARACTERISTICS OF CRUSHABLE GRANULES UNDER DYNAMIC EXCITATIONS

Funds: This project was supported by The Hubei Provincial Key Laboratory of Safety for Structural and Geotechnical Engineering (HBKLCIV201207), the Young Faculty Research Grant atWuhan University (2042014KF0007), and The National Key Basic Research Development Program (973 Program) sub-project (2014CB046902).
  • 摘要: 采用离散元的数值方法, 通过连接键将若干小颗粒绑定为一个具有不规则外形的大颗粒体, 设置不同连接键强度模拟了颗粒体在外加动力载荷下破碎过程, 并探讨其中系统能量耗散特性. 计算结果表明, 颗粒体的破碎程度决定了系统能量耗散率, 即内部耗能占外界输入能量的比例. 破碎率越高, 颗粒间相互摩擦和碰撞越剧烈,系统能量耗散率越高. 同时, 在循环载荷下系统内颗粒体破碎绝大部分发生在加载初期, 随着颗粒体的分解破碎速率逐渐减小, 系统耗能能力也随之降低.

     

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出版历程
  • 收稿日期:  2014-05-23
  • 修回日期:  2014-07-12
  • 刊出日期:  2015-03-18

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