An advanced semi-analytical model for the study of naval shock problems

Abstract

A semi-analytical model for a naval shock problem is proposed in this paper and applied to calculate the dynamic response of a submarine hull with on-board equipment to a pressure wave triggered by an underwater explosion. Although the proposed model corresponds to a simplification of actual configurations, it allows to derive meaningful data which are representative of naval shock environment and useful for architects as design values in the early stages of naval projects. The underlying assumptions and equations of the model are exposed, together with the numerical algorithms developed to solve them. A validation of the whole procedure is also proposed, by comparing the calculation results with reference data, from both literature and finite element computation. The model proves useful to highlight the parameters of primary importance for the physics at stake and to investigate their influences on the acceleration level of both the hull and the on-board equipment. Simple mathematical expressions are derived, and may prove useful for designers.