Relation among Important Structural ParametersFlyer Velocity and Energy of Flyer Driven by Micro-size Lead Azide

doi:10.3969/j.issn.1000-1093.2021.07.003

Abstract

Abstract: In order to obtain the relationship among the important structural parameters and the velocity and energy of flyer driven by micro-size lead azide, the simulation study of flyer driven by micro charge was carried out. The parameters of Jones-Wilkins-Lee equation of state of lead azide based on the γ law equation are fitted from the relationship between the detonation velocity and density of lead azide. A simulation model of the flyer driven by lead azide is established by using the finite element analysis software AUTODYN, and the velocity-distance curve of the flyer is measured by using photonic Doppler velocimetry system. The simulated curve is in well consistence with the test curve. The relationship among the diameter and height of charge, the aperture of accelerating chamber, the flyer thickness and the velocity and energy of flyer is analyzed by using the established simulation model. The results show that the velocity and energy growth rates of flyer decrease with the increase in the diameter and height of charge, and the influence of charge diameter on the velocity and energy of flyer is more obvious. With the increase in the flyer thickness, the flyer velocity decreases exponentially; the flyer energy first increases and then decreases, and there is a flyer thickness that makes the flyer energy maximum. When the aperture of accelerating chamber is smaller than the charge diameter, the velocity and energy of flyer decrease slightly; when the aperture of accelerating chamber is larger than the charge diameter, the velocity and energy of flyer decrease sharply.

Key words: leadazide, Jones-Wilkins-Leeequationofstate, chargediameter, chargeheight, flyerthickness, apertureofacceleratingchamber, flyervelocity, flyerenergy

CLC Number:

TJ450.2

HE Xiang, YAN Nan, ZENG Xiangtao, XIE Ruizhen, BAO Bingliang, ZHANG Liang, WU Weiming. Relation among Important Structural ParametersFlyer Velocity and Energy of Flyer Driven by Micro-size Lead Azide[J]. Acta Armamentarii, 2021, 42(7): 1363-1371.

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