Abstract
Experimental and finite element analyses are performed to identify the buckling strength of a large-scale specimen of tourist submarine subjected to external hydrostatic pressure. The tourist submarines are designed with multi-windows, built up of structural openings, affecting the buckling and ultimate strength of their pressure hulls. The hydrostatic pressure experiment is conducted in a pressure chamber, recording the external pressure and the structural strains. The experimental structural response and permanent deformation show a good agreement with the finite element analysis performed by the ABAQUS finite element solver. The numerical analysis presents some aspects of particular relevance to the buckling failure behaviour of the submarine hull subjected to a uniform external pressure. Additional analyses are performed to investigate the effect of material properties, structural openings and reinforcing rings. The buckling and ultimate strength of the prototype submarines are also evaluated to explore the critical design aspects of internal and external ring stiffeners.
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