Vol.20 No.4 龚敏等：爆破模型动光弹和全息干涉研究中的两个基本问题 ·315· 4结论 (1)对于无限平面集中载荷动态应力场，采用应力波特性+等差条纹图方法（理论一实 验解)和采用2种条纹图联合求解的方法（实验解）在求解膨胀波应力场上都是适用的，但对S 波应力场求解，只能用实验解的方法， (2)根据本文设计的验证方法，证明用时空导数判别等差条纹和利用光程变化判别等和 条纹的方法同样适用于波在边界反射后的情况，为解决较普遍条件下爆破条纹级次判别问题 清除了理论上的障碍， 参考文献 】朱振海，杨永琦.多火花式动态光弹性仪及其在爆炸力学实验中的初步应用.爆炸与冲击，1985(3)：67 2 Rossmanith H P,Shukla A.Dynamic Photoelastic Investigation of Interaction of Stress Waves with Running Cracks.Intemational Developments in Experimental Mechanics:Experimental Mechanics. Foarth Intemational Congress,1980.149 3赵华，毕谦，动态光弹性用于地震波屏蔽效应的探讨.见：付梦蘧主编，第六届全国实验力学学术会议 论文集，北京：北京大学出版社，1989.743 4龚敏，于亚伦，方祖烈.爆破模型动态应力场量化研究原理与初步实验.爆破与冲击，1997(1)43 5龚敏，于亚伦，佟景伟.爆破等差与等和条纹图分析方法探讨.爆炸与冲击，1997(3)：265 6 Durelli A J.Shukla A.Identification of Isochromatic Fringes.Experimental Mechanics,1983.23(1):11I Foundational Problems in Two Kinds of Blasting Model by Dynamic Photoelasticity and Hologram Interferometry Gong Min Fang Zulie Resources Engineering School.UST Beijing.Beijing 100083,China ABSTRACT The transient is opachic and isochromtic tringe patterns are acquired at a blast loading.Two kinds of ways are used to study transient stress field in infinite plate subjected to concentrated blasting load,the different calculation results are contrasted.A new verifying method for judging the orders of two kinds of fringes is devised if stress wave is reflected at the free boundary. KEY WORDS infinite plate subjected to concentrated blasting load;identification of fringe orders;holo-photoelasticity and holo-znterferometry