基于量纲分析的爆炸冲击波效应靶模型分析与实验研究  

Modeling of reactant plate subjected to explosion shock wave based on dimensional analysis and its experiment verification

作　　者：李丽萍[1] 孔德仁[1] 王芳[1] 商飞[1] 贾云飞[1] 

机构地区：[1]南京理工大学机械工程学院精仪系,南京210094

出　　处：《振动与冲击》2016年第6期100-103,168,共5页Journal of Vibration and Shock

基　　金：国家自然科学基金(11372143);国防计量(J092013B003)

摘　　要：针对传统的冲击波压力电测法易受爆炸场寄生效应干扰问题,提出基于效应靶塑性变形的爆炸冲击波压力评定方法。由于效应靶理论模型复杂、参数较多,利用量纲分析方法简化模型获得爆炸冲击波压力作用的效应靶最大挠度与炸药TNT当量、炸高及炸距之关系,并建立冲击波压力作用的效应靶最大挠度计算模型;设计100 kg、60 kg、20 kg三种标准TNT爆炸的立靶、平靶实验,用回归分析法获得二者经验模型系数。结果表明,立靶与平靶两种结构效应靶最大挠度实验结果与经验模型计算结果误差分别优于3.59%及3.33%。该研究可指导战斗部冲击波压力评估,进而减少爆炸实验量。In order to eliminate the interference in traditional electric measurement of shock wave pressure, a method to evaluate the shock wave pressure based on reactant plate plastic deformation was proposed. Considering the complexity of the theoretical reactant plate model with multiple parameters, the dimensional analysis was introduced to simplify the model, by which the relations between the deformation of reactant plate and TNT equivalent, mounting height and explosion distance wave obtained. Then, a calculation model of reactant plate deformation under standard TNT explosive shock wave was established. Three groups of experiments were designed to measure the reactant plate deformation under explosion shock wave of three TNT equivalents of 100 kg, 60 kg and 20 kg. A regression analysis method was applied to calculate the coefficients of the empirical models for vertical and horizontal reactant plates. Through comparison of the deformations by experiments empirical models, the errors of vertical reactant plate are less than 3.59% and 3.33% respectively. The analysis provides new ideas for shock wave damage effectiveness assessment and can greatly reduce the amount of explosive experiments.

关 键 词：爆炸力学 效应靶 塑性大变形 量纲分析 冲击波压力评定 

分 类 号：O383[理学—流体力学]