破碎发射药等效形状特征量的确定方法  

A Determination Method for Equivalent Shape Characteristic Parameters of Fractured Propellants

作　　者：王燕[1] 芮筱亭[1] 冯宾宾[1] 黎超[1] 于海龙[1] 

机构地区：[1]南京理工大学发射动力学研究所,南京210094

出　　处：《弹道学报》2015年第3期54-57,共4页Journal of Ballistics

基　　金：燃烧与爆炸技术重点试验室基金项目(940C3504060120C35133);江苏省博士研究生科研创新培养基金项目(CXZZ12_0216)

摘　　要：为了解决破碎发射药无法通过几何方法直接计算形状特征量的难题,基于起始动态活度比理论,利用全局连续分段最小二乘曲线拟合方法,建立了一种确定破碎发射药等效形状特征量的方法。通过发射装药动态挤压破碎试验得到了不同破碎程度的发射药,并进行了密闭爆发器试验。利用建立的方法计算了破碎发射药的等效形状特征量,计算结果与试验结果最大相对误差仅为1.81%,说明该方法合理可行,为研究发射药破碎情况提供了一种有效的方法。The shape characteristic parameters of fractured propellants can＇t be obtained by geometrical method. Aiming at this problem, an equivalent method was established by global con- tinuous curve fitting method of piecewise least square fitting, and this method was based on the theory of initial dynamic vivacity ratio. The propellant grains with different fracture degrees were Obtained by dynamic compression experiments,and the grains were tested in a closed bomb. The corresponding equivalent shape characteristic parameters were calculated by established method. The most relative error was only 1.81 % between calculated results and experiment results. The result shows that the method is reasonable and workable. The study provides an effective method to research the fracture degree of propellant grains.

关 键 词：发射药 破碎 形状特征量 密闭爆发器 

分 类 号：TJ303.4[兵器科学与技术—火炮、自动武器与弹药工程]