摘要
本文分别运用动态云纹-光弹性和电阻应变量测方法研究了相邻两炮孔之间爆炸应变场。多火花式高速像机和超动态量测系统被用于动态记录。根据动态云纹-光弹条纹分析了应力波的叠加作用,定量地计算了爆炸应力波叠加作用期间内不同时刻地孔连心线上ε_x(沿连心线方向)和ε_r(垂直于连心线方向)的分布以及ε_x在连心线中垂线上的分布。用应变片记录了爆炸应力波叠加作用时连心线上应变-时间示波器轨迹。测量和计算所得炮孔间应力波叠加和衰减的规律与理论分析和动光弹模拟分析结果一致。
The blasting strain fields between two adjacent boreholes initiated simultaneously were investigated with the dynamic moire-photoelasticity and strain gauges. A multiple spark dynamic photoelastic apparatus (Mode WZDD-1) and the super-dynamic measuring system were ulitized in dynamic recording. According to the dynamic moire-photoeia-stic fringe patterns.the superposition of blasting stress waves were analysed,and the distribution of εx(in the direction of the line linking two adjacent borehole centers) and ε(in the direction which is normal to the linking-center line) in the linking-center line and ε in the line which is vertical to the linking-center line through its middle point were calculated quantitatively. The oscillations of strainvs. time in the linking-cenmer line due to the superposition of blasting stress waves were recorded with the foil strain gauges. The law of superposition and attenuation of stress waves between boreholes derived from the measured and calculated results are in agreement with the results from the theoretical analyses.
出处
《爆炸与冲击》
EI
CAS
CSCD
北大核心
1989年第4期309-317,共9页
Explosion and Shock Waves
关键词
炮孔
爆炸
应变场
光弹性
分析
dynamic moire-photoelasticity,blasting strain fields, superposition of stress waves.
