热发射过程中发射箱蒙皮力学性能损伤与试验研究

文中选择大、中、小3种典型结构尺寸的发射箱，利用计算流体动力学（Computational fluid dynamics，CFD）仿真软件Fluent对发射箱蒙皮表面在导弹发射过程中的力、热环境进行了仿真分析。以铝合金材料为例，对发射箱蒙皮材料在燃气流环境中力学性能损伤情况进行了烧蚀试验研究。研究结果表明，随着烧蚀时间延长，铝合金材料力学性能损伤存在一个突变点，在1.5 s内下降不明显，但是当烧蚀时间延长至2.0 s时，力学性能急剧下降至0。该研究结果为铝合金发射箱轻量化设计、热防护设计和使用次数设计等提供了数据支撑。

Mechanical Properties Impairment and Test Research of Launch Container Skin During Thermal Launching

The thermal and pressure conditions on the launch container skin surface are studied by Fluent software, in which three typical sizes of launch containers are chosen. Aluminum samples are employed as a launch container skin example, and their mechanical property impairment are researched in ablating test during thermal launching. The results show that mechanical properties of aluminum samples decrease little as the erosion time increases to 1.5 s. But when the erosion time increases to 2.0 s, the aluminum samples lost their mechanical properties completely. The results support important data for lightly designing, protection designing and number times of use designing of container launches which made of aluminum alloy materials.