撞击坑
地质学
爆炸物
振动
有限元法
岩土工程
离散元法
喷出物
干砂
基础(证据)
冲击波
碎片
空气冲击
机械
结构工程
冲击波
工程类
物理
声学
采矿工程
天文
海洋学
化学
有机化学
量子力学
考古
超新星
历史
作者
Xianqi Xie,Yingkang Yao,Gui Yang,Yong-sheng Jia
出处
期刊:International Journal of Geomechanics
[American Society of Civil Engineers]
日期:2017-02-17
卷期号:17 (8)
被引量:12
标识
DOI:10.1061/(asce)gm.1943-5622.0000877
摘要
Blast-induced craters and ground vibrations caused by underground explosions are the foundation of explosion-resistance design for underground structures and protective facilities. In this study, large-scale blast experiments were performed in the field to investigate the characteristics of the ground vibrations and craters induced by single underground explosions in a loose, wet sand medium. Results from eight single blasts with emulsion explosives ranging from 200 to 400 g and buried depths ranging from 0.5 to 1.0 m are presented in this paper. A numerical simulation for Blast E8 using the coupled smoothed-particle hydrodynamics and finite-element method (SPH-FEM) is also presented. The influences of charge weight and buried depth on blast-induced crater formation and ejecta shape were studied. The experimental data for crater diameter were found to be roughly identical to the results suggested for wet sand. An empirical fitting formula for the ground vibration induced by single underground explosion in a loose, wet sand medium was developed using the vertical and radial components of peak particle velocity (PPV) obtained from the experiments. A numerical simulation using a coupled SPH-FEM was modeled to validate the experimental results and prove the method’s ability to model the blast-induced crater and ground vibration.
科研通智能强力驱动
Strongly Powered by AbleSci AI