摘要
根据动光弹仪在不同瞬间所拍摄的等差条纹图片,对束状炮孔的几种布孔形式(如直线形,半圆形和圆形)的爆炸应力场进行了定性分析,描述了各布孔形式下的应力波的传播、应力分布情况及其作用结果,比较了它们之间在这些方面的异同点。布孔形式、布孔参数不同,应力分布随之改变,爆破效果也异,尤其是不同布孔形式之间的这些差别更为明显。爆后分析结果表明,动光弹试验可为现场的工程设计提拱一定的理论依据。
According to isochromatic fringe pictures taken by dynamic photo-elastic apparatus at different moments, qualitative analysis of blasting stress field with several bunch hole patterns including straight line, semicircle and circle is made. Their stress wave propagation, stress distribution pattern and their affect are described. Stress distribution and blast effect change with blasthole pattern and parameters. Model break has verified this result. Therefore, the investigation offers certain theoretical criteria for field engineering design.
关键词
束状炮孔
动光弹
等差条纹
爆破
Bunch blasthole Dynamic photoelasticity Isochromatic fringe
