Simulation analysis of hydrodynamic ram in an aircraft fuel tank subjected to high-velocity multi-fragment impact

HAN Lu; HAN Qing; YANG Shuang

doi:10.11883/bzycj-2017-0230

Volume 38 Issue 3

Feb. 2018

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HAN Lu, HAN Qing, YANG Shuang. Simulation analysis of hydrodynamic ram in an aircraft fuel tank subjected to high-velocity multi-fragment impact[J]. Explosion And Shock Waves, 2018, 38(3): 473-484. doi: 10.11883/bzycj-2017-0230

Citation:

HAN Lu, HAN Qing, YANG Shuang. Simulation analysis of hydrodynamic ram in an aircraft fuel tank subjected to high-velocity multi-fragment impact[J]. Explosion And Shock Waves, 2018, 38(3): 473-484. doi: 10.11883/bzycj-2017-0230

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Simulation analysis of hydrodynamic ram in an aircraft fuel tank subjected to high-velocity multi-fragment impact

doi: 10.11883/bzycj-2017-0230

School of Aeronautics, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, China

Received Date: 2017-06-29
Rev Recd Date: 2017-09-02
Publish Date: 2018-05-25

Abstract

Abstract

As one of the major damage modes of an aircraft fuel tank, the hydrodynamic ram may cause a catastrophic destroy to the fuel tank structure. In order to analyze the multi-fragment impact on the fuel tank under actual combat circumstance, a validated full-filled fuel tank model under single fragment impact is firstly established. The impact situations of multi-fragment hit at the same time, double fragments hit with different spaces, and double fragments hit at different times are studied by using the finite element analysis software of ANSYS/LS-DYNA. The following parameters are carefully analyzed, including the pressure inside the fuel tank, the fragment velocity decay, the total energy absorbed by the water and the deformation of the fuel tank walls. The results show that, the peak pressure of the fluid in the tank is derived from the shock wave which is produced by the fragment; the superposition effect of pressure is enhanced under multi-fragment impact condition; the tank walls significantly deform with the growth of the number of incident fragments. Moreover, the residual velocity of the incident fragment will be increased by the latish one.
- high velocity,
- impact,
- aircraft fuel tank,
- hydrodynamic ram,
- multi-fragment,
- vulnerability

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References(24)

References

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