Abstract
Blast effects are severe especially in case of close underbelly blast events. The hull of the structure must resist the blast load with limited deformation and on the other hand it should have sufficient rigidity also to have optimised structural design. Numerical analysis revealed the peak deformation areas on the hull structure which were further stiffened by adding the stiffeners to control the peak deformation. In the analysis, the stress-time, pressure-time and deformation-time graphs were also obtained for the blast events for with and without adding stiffeners. The optimised plate thickness with limited deformation by means of stiffeners was obtained.
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