全息动光弹在爆破模型全场定量分析中的应用研究  

APPLICATION OF THE DYNAMICHOLOGRAPHIC PHOTOELASTICITY IN THE FULL FIELD QUANTITA TIVE ANALYSES ON BLASTING MODEL

作　　者：龚敏[1] 方祖烈[1] 

机构地区：[1]北京科技大学矿业研究所

出　　处：《岩石力学与工程学报》1994年第2期172-183,共12页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金

摘　　要：本文以最新的全息动光弹为手段，进行实验室二维爆破模型的全场动应力求解研究，在一次加载中同时获得了四个不同时刻的等和线与等差线条纹，从而首次在较为一般情况下完整地给出模型的全场动应力，解决了以往爆破模型全场主应力无法获得的难题。课题完成了全息动光弹实验系统的建立，包括研制走用同步控制电路、进行激光器内、外充路调试和激光器设计性能的重要改进；首次用光程变化原理研究爆破加载动态条纹刺据问题，发现了两种条纹的共同本质属性（另文发表）；计算并分析了半无限平面爆破加载，双孔同时起爆时应力波叠加前、叠加中是否保留爆生气体等情况的应力分布规律，得到了定量计算的结果。本课题对今后爆破模型的全场定量分析将起一定的积极作用．A nwe dynamic holophotoelasticity method is used in labroratory test to study the full field dynamicstress for two-dimensional blasting model.Four groups of transient istopachic patterns and transientisochromatic patterns at different time are aquired at one load,therefore,an integrated full ficld dynamicstress of the model is got at general conditions for the first time,and the two princial stress of the blastingmodel which has never been solved is settled.The dynamic holophotoelastic laboratory system is set,including special synchronous control devicedesign,inner and outer optical path adjustment of ruby laser,and improvement of the design natare ofraby laser.The theory of optical path changing is used in the judgement for dynamic fringe series of theblast loading,finding out the common nature of the two groups of tringes and regularity of stress distribu-tion ofthe boundary blasting charges of epoxy plate, before the stress wave interference and during it whentwo-hole simutaneously dotonated charges,of blasting gas reservation is calculated and analysized,lastly,the quantitative result is acquired.The thesis will be a great help for coming full field analysizing of theblast model.

关 键 词：全息动光弹 定量分析 爆破模型 

分 类 号：TD235.1[矿业工程—矿井建设]