HTPB推进剂力学性能散布与确定变量相关性研究  

Study on correlation between dispersion of mechanical property and certain variables of HTPB propellant

作　　者：张晓[1] 郑坚[1] 彭威[1] 顾志旭[1] 

机构地区：[1]军械工程学院,石家庄050003

出　　处：《固体火箭技术》2015年第3期378-382,共5页Journal of Solid Rocket Technology

摘　　要：针对复合固体推进剂力学性能存在散布的问题,通过方差分析试验,研究了松弛模量和泊松比的散布与确定变量之间的相关性。建立了力学性能散布的方差分析模型,分析了散布的变化规律,并对导致变化的原因进行了讨论。结果表明,松弛模量的散布受温度和载荷作用时间影响显著;泊松比的散布在不同的应变阶段差异较大,结构损伤的不确定性是导致泊松比散布变大的主要原因;玻璃化转变及结构失效会引起力学性能的很大散布。The mechanical property of composite solid propellant disperses within a certain range even in the same condition. The correlation between the dispersion of relaxation modulus and Poisson＇s ratio and certain variables was studied by analysis of variance experiments.Variance analysis models of dispersion were established.The change rules of dispersion were analyzed and the reasons were discussed. The results show that temperature and loading time have significant impacts on relaxation modulus＇disper-sion,and the dispersion of Poisson＇s ratio at different stages has a very significant diversity.Uncertainty of structural damage is the major cause of the increase of Poisson＇s ratio＇s dispersion.The glass transition and structural failure can lead to great dispersion of mechanical property.

关 键 词：HTPB推进剂 方差分析 力学性能散布 结构损伤 松弛模量 泊松比 

分 类 号：V512[航空宇航科学与技术—航空宇航推进理论与工程]