Empirical initial scantling equations on optimal structural design of submarine pressure hull

Oh, Dohan and Koo, Bonguk (2018) Empirical initial scantling equations on optimal structural design of submarine pressure hull. Journal of Advanced Research in Ocean Engineering, 4 (1). pp. 7-15. ISSN 2384-1060 (https://doi.org/10.5574/JAROE.2018.4.1.007)

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Abstract

The submarine is an underwater weapon system which covertly attacks the enemy. Pressure hull of a submarine is a main system which has to have a capacity which can improve the survivability (e.g., protection of crews) from the high pressure and air pollution by a leakage of water, a fire caused by outside shock, explosion, and/or operational errors. In addition, pressure hull should keep the functional performance under the harsh environment. In this study, optimal design of submarine pressure hull is dealt with 7 case studies done by analytic method and then each result's adequacy is verified by numerical method such as Finite Element Analysis (FEA). For the structural analysis by FEM, material non-linearity and geometric non-linearity are considered. After FEA, the results by analytic method and numerical method are compared. Weight optimized pressure hull initial scantling methods are suggested such as a ratio with shell thickness, flange width, web height and/or relations with radius, yield strength and design pressure (DP). The suggested initial scantling formulae can reduce the pressure hull weight from 6% and 19%.

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