Application of acoustic black hole ring in missile interstage vibration reduction and shock isolation

WANG Xiaodong1, ZHANG Haochun1, ZHAO Guiqi1, JI Hongli2

Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (1) : 1-8.

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PDF(3167 KB)
Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (1) : 1-8.

Application of acoustic black hole ring in missile interstage vibration reduction and shock isolation

  • WANG Xiaodong1, ZHANG Haochun1, ZHAO Guiqi1, JI Hongli2
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Abstract

In the missile system, the vibration and impact produced by the engine and pyrotechnics will seriously affect the accuracy and reliability of the warhead, so it is significant to take effective measures to reduce the vibration and isolate the impact. Acoustic black hole (ABH) effect allows altering the phase velocity and group velocity of the wave propagation in a structure by changing the impedance. As a result, the wave is concentrated in the local area of the structure, and energy is efficiently dissipated by a little damping. The ABH with the advantages of high efficiency, light weight, wide frequency, which provides a new idea for structural dynamics control, and has the strong potential and application prospects. In this paper, with the aim of vibration suppression and shock isolation in multistage missile, a kind of structural design schemes (ABH ring) based on the ABH effect are presented to ensure the accuracy and reliability. The dynamics characteristics of ABH ring are analyzed by using the finite element method. It can be seen that the ABH ring has good characteristics about transfer and consumption of energy. The simulation model of ABH ring-warhead is established. By simulating the impact of random vibration and stage separation during flight, the system response characteristics are analyzed and suppression effect is evaluated. The results show that the proposed ABH ring has a good effect of vibration suppression and shock isolation under complex dynamic load: reducing the amplitude and increasing the attenuation rate. This research not only provides ideas for missile vibration reduction and shock isolation, but also effectively broadens the application of ABH new technology.

Key words

missile / acoustic black hole / vibration shock / vibration suppression and shock isolation

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WANG Xiaodong1, ZHANG Haochun1, ZHAO Guiqi1, JI Hongli2. Application of acoustic black hole ring in missile interstage vibration reduction and shock isolation[J]. Journal of Vibration and Shock, 2024, 43(1): 1-8

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