【摘要】 设计了一种新的全息干涉光路,在一次爆破加载中获得不同时刻的动态离面位移场(即质点垂直振幅)条纹图,并以此研究了条形药包爆破时不同剖面的位移变化规律,研究表明:条形药包中垂线上的离面位移极值均为P波引起,并在爆破后的任意时刻至少大于全场其他剖面位移极值的3倍以上;其余方向的位移极值由瑞利波产生,药包轴线方向位移显示出明显的端部效应;因此,该方法对爆破模型位移场研究具有重要的意义。更多还原

【Abstract】 An optical path of a new holographic interferometry technique is developed to measure and represent vertical displacement (vertical amplitude) fringe patterns acquired at different times in one blast. The displacement variations with line charges is studied at different cross sections of the blast region. The test data show that extreme values of vertical displacement,which is caused by P wave,along the perpendicular line of the line charge middle point is three times more than that of other sections in the full field after the detonation. In addition,the extreme displacement values in other directions are caused by Rayleigh wave. The displacement pattern along the axis of the line charge shows an obvious end-effect. The technique represents an important development in analysis of blast induced displacement fields.更多还原