Structural Engineering and Mechanics

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Crash analysis of military aircraft on nuclear containment

  • Sadique, M.R. (Department of Civil Engineering, Indian Institute of Technology Roorkee) ;
  • Iqbal, M.A. (Department of Civil Engineering, Indian Institute of Technology Roorkee) ;
  • Bhargava, P. (Department of Civil Engineering, Indian Institute of Technology Roorkee)
  • Received : 2013.11.05
  • Accepted : 2014.07.06
  • Published : 2015.01.10
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Abstract

In case of aircraft impact on nuclear containment structures, the initial kinetic energy of the aircraft is transferred and absorbed by the outer containment, may causing either complete or partial failure of containment structure. In the present study safety analysis of BWR Mark III type containment has been performed. The total height of containment is 67 m. It has a circular wall with monolithic dome of 21m diameter. Crash analysis has been performed for fighter jet Phantom F4. A normal hit at the crown of containment dome has been considered. Numerical simulations have been carried out using finite element code ABAQUS/Explicit. Concrete Damage Plasticity model have been incorporated to simulate the behaviour of concrete at high strain rate, while Johnson-Cook elasto-visco model of ductile metals have been used for steel reinforcement. Maximum deformation in the containment building has reported as 33.35 mm against crash of Phantom F4. Deformations in concrete and reinforcements have been localised to the impact region. Moreover, no significant global damage has been observed in structure. It may be concluded from the present study that at higher velocity of aircraft perforation of the structure may happen.

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References

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