Impact Load Characteristics of a Trans-media Vehicle during High-speed Water-entry

doi:10.3969/j.issn.1000-1093.2021.07.011

Abstract

Abstract: The trans-media vehicle conbines the advantages of missiles and supercavitating weapons, which has higher terminal penetration capability compared to missile and makes up for the shortcoming of short range of supercavitating weapon. The impact load characteristics of a trans-media vehicle during high-speed water-entry and the load-reduction method are the main key technologies for the development of trans-media vehicles. A coupled simulation model for multi-phase flow and trajectory of trans-media vehicle entering into water at high speed was established and verified.The impact load characteristics of trans-media vehicle during high-speed water entry under typical conditions were simulated, and the ballistic parameters of trans-media vehicle in the high-speed water-entry process were compared. The results show that the periodical normal overload is generated during the tail-slapping, which is about 2.7 times as high as the axial overload, and the normal force is mainly composed of the positional force caused by the oscillating angle of attack, and the inertial force is very small and could be ignored. The increase in the water-entry speed speeds up the tail-slapping frequency and decreases the angle of attack oscillation amplitude, and the water-entry speed has little effect on the normal impact force coefficient.

Key words: trans-mediavehicle, high-speedwater-entry, impactload, tail-slappingmotion, numericalmodeling

CLC Number:

TJ630.2

YUAN Xulong, LI Min, DING Xutuo, REN Wei, ZHOU Fangxu. Impact Load Characteristics of a Trans-media Vehicle during High-speed Water-entry[J]. Acta Armamentarii, 2021, 42(7): 1440-1449.

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