| 基于流固耦合加载技术的DDA方法 |
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| 引用本文： | 余德运,刘殿书,王庆斌,何成龙.基于流固耦合加载技术的DDA方法[J].爆破,2016,33(1):6-11. |
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| 作者姓名： | 余德运 刘殿书 王庆斌 何成龙 |
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| 作者单位： | 中国矿业大学 北京 力学与建筑工程学院,北京,100083;保利民爆哈密有限公司,哈密,839200;北京理工大学 爆炸科学与技术国家重点实验室,北京,100081 |
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| 基金项目： | 国家自然科学基金项目( No.51374038)重复爆破荷载作用下岩石动态疲劳损伤特性研究 |
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| 摘 要： | 针对目前DDA方法尚没有实现对爆炸荷载耦合加载,而常用的两种爆炸荷载等效加载方法又存在不足的现状,在原DDA程序中引入基于空间网格覆盖判断的耦合加载子程序,并用来模拟集中药包爆破。结果表明:基于网格覆盖判断的耦合技术的DDA方法,能体现岩石爆破中爆生气体和爆炸冲击波共同作用;能实现爆生产物气体对周围岩石介质的准确、持续加载;能体现最小抵抗线对爆生气体作用时间的影响;能够较好地对模拟岩石爆破过程中,爆炸产物气体对孔壁的作用,产物气体在裂缝中泄漏时对裂缝的扩张作用,以及抛掷过程中产物气体对岩块的驱动作用。
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| 关 键 词： | 非连续变形分析 流固耦合 数值模拟 |
An Improved DDA Method based on Fluid-Structure Coupling Loading Technology |
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| YU De-yun,LIU Dian-shu,WANG Qing-bin,HE Cheng-long.An Improved DDA Method based on Fluid-Structure Coupling Loading Technology[J].Blasting,2016,33(1):6-11. |
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| Authors: | YU De-yun LIU Dian-shu WANG Qing-bin HE Cheng-long |
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| Abstract: | The present DDA method could not perform the blast load by fluid-structure coupling,and there two e-quivalent methods have deficiency. The coupling subroutine based on spatial grid coverage judgment was added to the original DDA program,and used to simulate the charge blasting. The result showed that:the extended DDA program could achieve accurate and sustained blasting load,it could reflect the effect of minimum burdens on the detonation gas loading time and blasting scope,it could simulate the blowing,the cavity expanding,the explosive gassed escaping process. |
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| Keywords: | DDA fluid-structure interaction numerical simulation |
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