关于Gurney公式的强度效应修正  

Strength Effect Correction of Gurney Formula

作　　者：范亚夫[1,2] 段祝平[3] 

机构地区：[1]中国兵器工业集团52研究所烟台分所,山东烟台264003 [2]北京理工大学爆炸科学与技术国家重点实验室,北京100081 [3]中国科学院力学研究所,北京100080

出　　处：《弹道学报》2009年第1期27-30,共4页Journal of Ballistics

基　　金：北京理工大学爆炸科学与技术国家重点实验室基金项目(KFJJ04-5)

摘　　要：为了使Gurney公式能够在考虑材料强度的前提下预测爆轰驱动速度,采用量纲分析的方法,分析了影响柱壳爆轰驱动的主要因素,建立了抛射速度与主要物理量的函数关系.此函数关系经分离变量后,分别通过理论分析和数值仿真予以确定.分析表明,随着屈服应力的提高,壳体的径向极限速度下降,断裂时间提前.柱壳爆轰驱动的强度效应不容忽略.利用炸药爆速、炸药与柱壳的质量比、柱壳材料的屈服强度和密度等参数,通过拟合公式能够预测柱壳爆轰驱动的极限膨胀速度.In order to forecast velocity of detonation-driven body under the conditions of considering materials intensity by Gurney formula, based on the dimensional analysis, the main factors affecting the explosive output for driving cylindrical shell were analyzed. The functional relation between the driven velocity and main physical parameters were established. After separating variables, the functional relationship was determined by theory analysis and numerical simulation. The results show that the radial limit velocity of shell decreases with the increase of yield stress, and the breaking time is advanced. The strength effect of explosive output for driving cylindrical shell cant＇t be ignored. By fitting formula, the critical expanding velocity of explosive output for driving cylindrical shell can be forecasted using parameters such as detonation velocity of explosive, mass ratio of explosive to cylindrical shell, the yield strength of cylindrical materials and density.

关 键 词：爆轰驱动 量纲分析 数值仿真 

分 类 号：O382.4[理学—流体力学]