Study On Calculation Technique Of Overall Strength Of Warship Subjected To Underwater Explosion Loads

It is considered that warship is exposed to non-contact underwater explosion loads when sailing on the sea and hull's overall responses of the warship subjected to the combination of bubble pulsation loads and wave loads in this paper. The purpose of this paper is investigating the overall strength of surface warship subjected to explicit loads including static bending moments, wave bending moments and bubble pulsation pressure.Firstly, the paper analyzes several typical underwater explosion models of warship using coupled acoustic-structural arithmetic. The methods and techniques are summarized using coupled acoustic-structural arithmetic to the numerical simulation analysis of underwater explosion, and the calculational and experimental data are compared and analyzed.Secondly, the paper transforms the explicit forces on every station into node forces acting on warship during researching on overall longitudinal bending of warship. The finite element results compare with the theoretical results. The comparative result show that the arithmetic adopted in the paper is feasible in engineering field.Thirdly, the paper simulates numerically the whole process of warship subjected to underwater explosion loads. Through plenty of numerical calculation, the paper analyzes and summarizes that the bubble pulsation loads have an effect on overall longitudinal strength when the dynamite charges blast near the warship at different position, different depth and different charge's weight. Further, the regular curves are gained and the check-up methods of overall longitudinal strength are summarized undergoing underwater explosion loads. Fourthly, the paper calculates numerically the wet mode of surface warship. It...