全息干涉法在条形药包离面位移场研究中的应用  

Application of holographic interferometry to study vertical displacement field in linear charge

作　　者：龚敏[1] 王德胜[1] 黎剑华[2] 

机构地区：[1]北京科技大学,北京100083 [2]中南大学,湖南长沙410083

出　　处：《爆炸与冲击》2005年第3期227-231,共5页Explosion and Shock Waves

基　　金：国家自然科学基金项目(19802002)

摘　　要：以新型红宝石激光照相装置为基础,进行动态全息实验系统研究及设计,实现了一次爆破加载获取四个动态过程爆破模型的位移场条纹图,用此研究了线型载荷爆破时质点离面位移振动的变化规律。研究表明:端部延长线方向离面位移值在全场所有剖面始终最小,发现在线型载荷离面位移场和应力场一样,同样存在端部效应现象;中垂线上的最大位移值在不同时间都高于其它计算剖面位移极值;瑞利波产生的位移衰减很慢。On the basis of the new ruby laser apparatus, the experiment system of transient holographic interferometry is devised, by which vertical displacement fringe patterns at four different times are acquired in one blasting loading. And the vertical displacement changing of different sections is studied in linear blasting charge. The result shows that the displacements in axis direction are the smallest in any sections; it is found that the phenomenon of end effect which exists in stress field exists in the displacement field in linear charge too. Extreme values of vertical displacement at perpendicular line of the linear charge middle point is the biggest in all of the sections analyzed in the full field after any time of detonation; The strength of the displacement which is caused by Rayleigh wave reduces slowly.

关 键 词：爆炸力学 动态位移 全息干涉法 爆破模型 

分 类 号：O389[理学—流体力学]