底排药受力载荷及其分布规律  

Load and Its Distribution of the Base Bleed Charge

作　　者：张之明 王家鹏 张远 焦宗平 陈国发 江虹 姚红 李任然 

机构地区：[1]驻辽宁庆阳特种化工有限公司军事代表室,辽宁辽阳111002 [2]总装备部沈阳军事代表局,辽宁沈阳110015

出　　处：《火炸药学报》2014年第3期78-81,共4页Chinese Journal of Explosives & Propellants

摘　　要：针对底排药在发射过程中可能出现的破裂破坏,分析了底排药在发射过程中所受的的轴向应力、径向应力、切向应力和综合应力,并通过拉伸与压缩实验验证了应力对底排药的影响。理论分析结果表明,在弹丸被击发开始的较短时间内,底排药轴向应力急剧增加并迅速达到峰值,此时径向应力的增加比较缓慢,综合应力主要为轴向应力;此后到弹丸出炮口发射出去的时间结点为止,底排药的轴向应力逐渐减弱,径向应力逐渐升高,综合应力开始递减,在达到极小值后转为递增状态,此时综合应力主要为径向应力。底排药综合应力的最大值存在于发射过程的前半段,避免底排药发生破裂破坏的主要措施是减少底排药在轴向产生附加受力。实验结果表明,轴向应力的实验值与计算值接近,是底排药破裂的主要因素。Aiming at the destruction and rupture of base bleed charge occurred in the process of launching, the axial stress, radial stress, tangential stress and comprehensive stress occurred in the process of launching of base bleed charge were analyzed. The effects of stress on the base bleed charge were verified by tension and compression test. The results show that within a short time began to fire the projectile, the axial stress of base bleed charge increases dramatically and reaches peak value quickly, in the time the radial stress increases slowly, the comprehensive stress is mainly the axial stress; then to the projectile muzzle fired out time nodes, the axial stress of base bleed charge decreases gradually, radial stress increases gradually, the comprehensive stress affected by two kinds of stress begins to decline. The comprehensive stress reaches the minimum value and then turns to increasing state, at this time the comprehensive stress is mainly the axial stress. The comprehensive stress of base bleed charge exists in the first half of launching. Main measures to avoid the broken on base bleed charge is to reduce axial additional stress. The experimental value of axial stress approached the calculated ones, and the axial stress was the main influence causing the rupture of bast bleed charge.

关 键 词：材料科学 底排药 底排技术 复合增程弹 应力 曲线参数估计 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] O347[理学—固体力学]