复合固体推进剂振动疲劳损伤耗散特性研究

Research on Dissipation Characteristic of Vibration Fatigue Damage for Composite Solid Propellant

为考察运输过程中振动载荷对固体推进剂的影响,进行了复合固体推进剂振动疲劳损伤耗散特性研究,分析了复合固体推进剂的力学特性和记忆特性,讨论了推进剂在振动载荷作用下的疲劳损伤特征,给出了临界应力循环数及变化规律,建立了基于振动耗散能的累积损伤模型,可以计算发动机固体装药在公路运输和舰载环境下的振动累积损伤。

The dissipation characteristic of fatigue damage for composite solid propellant was studied for evaluating the effects of vibration loading on solid propellant. The mechanical and memory characteristic of propellant was analyzed. The characteristic of fatigue damage of propellant under vibration loading was dis-cussed. The critical stress cycle number and its change law were given. The cumulative damage model based on vibration dissipated energy was set up. The results can afford available help for calculating cumu-lative damage of solid charge under vibration of road transportation and shipbone.