摘要
利用LS-DYNA有限元程序及流固耦合算法,对多孔铜的爆炸压实过程进行数值模拟研究。建立了多孔铜爆炸压实的三维四分之一模型,模型由空气、炸药和多孔铜三部分组成。炸药、空气与多孔铜的相互作用通过流固耦合算法来实现。根据得到的压力云图,对球面爆轰波和滑移爆轰的传播,多孔铜侧壁压力变化等问题进行了分析。结果表明,爆炸压实过程中多孔铜侧壁压力随滑移爆轰向下传播而逐渐增加,当夹角增加到90度后,角度及压力不再变化,形成稳定的滑移爆轰,多孔铜侧壁压力达到最大值,约为炸药爆压的85%。
The fluid-solid coupling algorithm is applied in the numerical simulation of explosive compaction of porous copper.A three-dimensional model is built that consists three parts： air,explosive and porous copper.The results show that the pressure on side wall increases with the propagation downward of detonation waves.The increase of angle between sliding detonation front and side wall of porous copper causes the increase of pressure.When the angle reaching 90 degree,stable detonation is formed and the pressure reaches maximum about 85% of detonation pressure.The fluid-solid coupling algorithm that can avoid meth distortion is very suitable for calculating large deformation problem in explosion mechanics region.
出处
《科学技术与工程》
2010年第32期8001-8004,共4页
Science Technology and Engineering
基金
国家自然科学基金(10802038)资助
关键词
爆炸压实
流固耦合
数值模拟
冲击波
explosive compaction fluid-solid coupling numerical simulation shock waves
