[1]洪俊,张镇,刘俊,等.梯形载荷下伴随破碎的散粒体系统动力学分析[J].东南大学学报(自然科学版),2015,45(4):787-791.[doi:10.3969/j.issn.1001-0505.2015.04.030]
 Hong Jun,Zhang Zhen,Liu Jun,et al.Dynamic analysis of granular system with fracture under ladder load[J].Journal of Southeast University (Natural Science Edition),2015,45(4):787-791.[doi:10.3969/j.issn.1001-0505.2015.04.030]
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梯形载荷下伴随破碎的散粒体系统动力学分析()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
45
期数:
2015年第4期
页码:
787-791
栏目:
数学、物理学、力学
出版日期:
2015-07-20

文章信息/Info

Title:
Dynamic analysis of granular system with fracture under ladder load
作者:
洪俊12张镇1刘俊1王立源1
1东南大学土木工程学院, 南京210096; 2东南大学江苏省工程力学分析重点实验室, 南京210096
Author(s):
Hong Jun12 Zhang Zhen1 Liu Jun1 Wang Liyuan1
1School of Civil Engineering, Southeast University, Nanjing 210096, China
2Jiangsu Key Laboratory of Engineering Mechanics, Southeast University, Nanjing 210096, China
关键词:
散粒体系统 离散单元法 链接模型 接触模型 破碎模型
Keywords:
granular system discrete element method connective model contact model fracture model
分类号:
O347.7
DOI:
10.3969/j.issn.1001-0505.2015.04.030
摘要:
为了获得脆性颗粒材料组成的散粒体系统在动载荷作用下的力学响应,对圆筒内散粒体系统在梯形载荷作用下的力学行为进行了数值研究.建立了链接模型、接触模型以及弹簧-球单元破碎模型;基于离散单元法编制了计算程序,分析了梯形载荷作用下的散粒体系统动力学响应;采用OpenGL图形显示了部分颗粒的破碎过程.结果表明,在梯形载荷作用下,对不同的载荷值,散粒体系统存在相应的暂时稳定状态,并且随着载荷大小的递增,系统达到稳定状态的时间越短,系统的变形也越小;计算过程中发现部分粒子发生破碎,且上层粒子首先被冲击破碎,破碎情况最为严重.研究结果对发射装药发射安全性有着重要的理论意义.
Abstract:
In order to obtain the dynamical response of a granular system composed of brittle grains, a granular system in barrel subjected to ladder load is studied. The connective model, contact model and spring-sphere fracture model are established. Computational codes based on the discrete element method are written to analyze the dynamical response of the granular system. The fracture courses of part grains are shown by OpenGL figures. The simulation results prove that the granular system has temporal steady states corresponding to different load values under the ladder load. With the increase in the load, time intervals between two steady states become smaller, and the whole deformations of the granular system become less. In the simulation process, part grains are fractured in the whole granular system. Meanwhile, top grains in the granular system fracture first and the degrees of their fracture are the severest. The results have important theoretical value for the launch safety of ammunition.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期: 2014-12-10.
作者简介: 洪俊(1978—),男,博士,副教授,junhong@seu.edu.cn.
基金项目: 国家自然科学基金资助项目(11302049)、教育部留学回国人员科研启动基金资助项目.
引用本文: 洪俊,张镇,刘俊,等.梯形载荷下伴随破碎的散粒体系统动力学分析[J].东南大学学报:自然科学版,2015,45(4):787-791. [doi:10.3969/j.issn.1001-0505.2015.04.030]
更新日期/Last Update: 2015-07-20