立式贮存固体火箭发动机装药可靠性及影响因素研究  

Reliability and Influencing Factors of Solid Rocket Motor Grain under Vertical Storage

作　　者：王鑫 赵汝岩 高鸣 李金飞 刘磊 WANG Xin;ZHAO Ru-yan;GAO Ming;LI Jin-fei;LIU Lei(Coast Defense College,Naval Aviation University.Yantai 264001,China;Naval Academy of Armament,Beijing 100161,China)

机构地区：[1]海军航空大学岸防兵学院,山东烟台264001 [2]海军装备研究院,北京100161

出　　处：《推进技术》2020年第8期1823-1830,共8页Journal of Propulsion Technology

基　　金：预研重点基金(9140A28010215JB14073)。

摘　　要：为了研究立式贮存对发动机药柱贮存可靠性的影响,开展基于全寿命周期载荷的固体火箭发动机药柱可靠性研究。在通过高温加速老化试验获取贮存温度下推进剂延伸率随贮存时间的变化规律基础上,开展考虑老化、温差、重力和弹射过载与内压联合载荷下的发动机随机有限元分析,获取药柱危险点应变均值和标准差变化规律,并计算不同工况下药柱可靠度,得到老化时间和静态立式贮存次数对贮存可靠性的影响;进而开展发动机实测振动载荷数值模拟和动态疲劳损伤计算,得到动态立贮次数与药柱可靠性的关系,最后进行灵敏度分析,获取影响因素重要度。结果表明:药柱点火可靠度与立贮次数之间可用负指数函数进行表示,以0.9为可靠性下限,老化0,5,10和15年后发动机可允许的动态立贮次数分别为19,11,2和0次。To study the effects of vertical storage on the storage reliability of motor grain,the grain reliability of a solid rocket motor based on life-cycle loadings is carried out.On the basis of the variation rules of propellant elongation with storage time at storage temperature obtained by accelerated aging test at high temperature,the stochastic finite element analysis of motor grain under the combination of aging,temperature difference,gravity,ejection overload and pressure is carried out,and the average and standard value of grain strain of dangerous location are also obtained.Then by calculating the reliability under different conditions,the effects of aging year and storage times on reliability were also obtained.Moreover,the numerical modeling and the calculation of dynamic fatigue damage under actual vibration loadings are carried out,and then the relationship of dynamic vertical times and reliability is obtained.Finally,sensitive analysis is carried out to acquire the order of importance of all parameters.Result shows that it can be represented by a negative exponential function between the ignition reliability and vertical storage times,the allowable dynamic vertical storage times of the motor with 0.9 reliability lower limit during 0,5,10 and 15 years of aging time is 19,11,2,and 0,respectively.

关 键 词：固体火箭发动机 立式贮存 加速老化试验 随机有限元 可靠性 灵敏度分析 药柱 

分 类 号：V435[航空宇航科学与技术—航空宇航推进理论与工程]