黄土中爆炸空腔体积规律的数值模拟  

Numerical Simulation of Cavity Volume Rule of Explosion in Loess

作　　者：王志鹏[1] 李海超 周双涛[1] 李北杰 

机构地区：[1]军事交通学院研究生管理大队,天津300161 [2]军事交通学院国防交通系,天津300161

出　　处：《爆破》2016年第4期73-77,126,共6页Blasting

摘　　要：黄土中爆炸成腔的大小与黄土参数具有密不可分的关系,其中黄土的天然密度和含水率是主要影响因素。利用ANSYS/LS-DYNA软件进行三维建模,模拟黄土中爆炸成腔的过程,与黄土中爆炸试验结果进行对比,从空腔体积、峰值应力、爆后土体密度3个方面验证数值模拟的可行性。以土体天然密度和含水率作为影响因素,对黄土中爆炸空腔的体积规律进行数值模拟研究,得到三维拟合规律,发现天然密度对爆后空腔体积影响较大,含水率对其影响较小。The size of explosion cavity has a close relationship with the parameters of loess, and the natural density and water content of loess are the main influencing factors. By using ANSYS/LS-DYNA for 3 D modeling, the explosion process in loess is simulated. The feasibility of the numerical simulation is verified by 3 aspects as volume of the cavity, peak stress and soil density. Taking natural density and water content of loess as influencing factors, the volume of the explosion cavity in the loess is studied by numerical simulation, and the 3D fitting law is obtained. It is found that the natural density has a greater impact on the cavity volume, and the water content has little effect on it.

关 键 词：黄土 爆炸 空腔体积 数值模拟 

分 类 号：O383.1[理学—流体力学]