摘要
为研究球形药包爆破漏斗实验中自由面鼓包运动规律,采用能够较好模拟现场岩土的相似材料制作了一组水泥砂浆模型进行了爆破漏斗实验,利用高速摄影系统记录了模型在球形药包作用下自由面的鼓包运动,得到了鼓包运动轮廓、鼓包表面中心位移和速度分布.结果表明:鼓包表面中心在速度分布上呈现出加速-匀速-二次加速-减速的特征,鼓包上升到约1.5倍抵抗线后,抛体按照弹道运动规律进行抛掷.
To test the bulging movement laws in blasting crater tests of spherical charge,a set of cement mortar model that could simulate rock soil well was produced to make blasting crater tests.The bulging movement on the free surface centre was recorded using high speed photography system,bulging movement contour lines,bulge center velocity distribution and displacement distribution were obtained. The results indicate that bulge center velocity distribution presents a characterisitic property of acceleration-uniform-accderation-decekeratuibm after bulge center displacement inocreases to 1.5times burden length,projectiles threw according to ballistic motion laws.
出处
《北京理工大学学报》
EI
CAS
CSCD
北大核心
2015年第12期1228-1232,共5页
Transactions of Beijing Institute of Technology
基金
国家自然科学基金资助项目(51304087
51564027)
爆炸科学与技术国家重点实验室(北京理工大学)开放基金资助项目(KFJJ15-14M)
云南省基金资助项目(KKSY201404056)
关键词
水泥砂浆模型
爆破漏斗实验
高速摄影
鼓包运动
cement mortar models
blasting crater test
high speed photography
bulging movement
