聚能射流侵彻飞机铝合金蒙皮的仿真与实验研究

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Abstract Traditional cutting methods cannot meet the repair requirements of aircraft skin perforation damages under battlefield conditions.This article proposed a novel method to cut metal skin damage areas by taking advantage of the Munroe effect of charges.The authors conducted research on the new explosive cutting process using 2A12 aluminum plates of 2 mm thickness.The application carriers of the explosive cutting technology were lead-shell metal-pipe linear shaped charges with wedge-shaped grooves,and the cutters were filled up with hexogen (RDX).Based on the ANSYS/LS-DYNA,the finite element model of the linear shaped charge penetrating aluminum alloy plates was constructed.The cutting performances of linear shaped charges under different process parameter sets were analyzed using the orthogonal design method.Three influencing factors,including charge linear density,liner apex angle,and standoff were optimized.The numerical calculation results agree well with the experimental results,which indicates the favorable accuracy of the finite element model.In the end,the optimized explosive cutting process parameters were decided as a charge linear density of 1.5 g/m,a liner apex angle of 80°,and a standoff of 0.The prototype tests implies that new linear shaped charges adopting these parameters could meet the battlefield repair requirements of aircraft skin perforation damages in the aspects of cutting accuracy and abnormity cutting.

Key words： linear shaped charge penetration jet shock aluminum alloy aircraft skin

Received: 11 August 2017 Published: 15 February 2019

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	Articles by authors
	DONG Shikang1
	HU Fangyou1
	CUI Aiyong1
	HUANG Xudong2
	LIU Qian2

Cite this article:

DONG Shikang1,HU Fangyou1,CUI Aiyong1, et al. Simulation and experiments on shaped charge jets’ penetration into aircraft aluminum-alloy skin[J]. JOURNAL OF VIBRATION AND SHOCK, 2019, 38(4): 184-190.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2019/V38/I4/184

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