Abstract:During oblique launch of a missile, the conventional hydraulic erection cylinder experiences axial displacement due to the large load, which aggravates the vibrations in the launcher and reduces the launch accuracy and safety of the missile. To this end, this study proposes an erection cylinder based on liquid metal solid-liquid phase change. The erection cylinder uses the solid-liquid phase change principle of liquid metal; when the metal is in the liquid phase, the erection cylinder can be freely adjusted vertically, and when the metal is in the solid phase, the erection cylinder is locked and can bear a large load. The results show that the displacement of piston rod and the stress and deformation of the cylinder canister in liquid metal erection cylinders are smaller than those in conventional hydraulic erection cylinders, under the same load; the larger the load, the larger was the difference. The load-bearing characteristics of the liquid metal cylinder were found to be better than those of the conventional hydraulic erection cylinders. The pitch angle velocity of the missile was reduced by 9.61 deg/s when the liquid metal erection cylinder was in operation, and the minimum distance between the missile and launch box was increased by 80 mm, which effectively improves the launch accuracy and safety of the missile. The solidification time of the liquid metal in the erection cylinder was 45 s when the liquid metal was cooled down by water spray, and the melting time of the liquid metal was 75 s when the liquid metal was heated by a 5-kW heating film. These results can have a significant impact on improving the launch accuracy and safety of the missiles.
收稿日期: 2022-05-23
出版日期: 2023-08-15
引用本文:
严松,邓月光,苏政宇,姜毅,王登. 基于液态金属固液相变的起竖缸研究[J]. 振动与冲击, 2023, 42(15): 15-22.
YAN Song, DENG Yueguang, SU Zhengyu, JIANG Yi, WANG Deng. Erection cylinder based on solid-liquid phase change of liquid metal. JOURNAL OF VIBRATION AND SHOCK, 2023, 42(15): 15-22.
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