Research On Anti-shock Capacity Of The Non Pressure Structure Of Submarine Subjected To Underwater Explosion

With the continuous development of weapons in water, submarine living environment is more and more bad. The threat of submarine is increasingly diverse and complex. So the navy has pay more attention to the research of submarine anti-explosion resistance performance.Regarding the defensive problem of a submarine under the far field underwater explosion loading as the research background, this paper carry out the new impact resistant nonpressure structure in order to improve the ability to resist submarine underwater explosion.Based on these researches,some innovation is made to improve the existing the nonpressure structure impact resistance design.The paper mainly includes:(l)This paper introduces the basic theory of underwater explosion and research methods. This paper focuses on the underwater explosion shock waves and bubbles on the formation mechanism of the pulse and the different effects of the submarine structure; And analysis of the current problems of underwater explosion study several methods, according to its own research conditions, the selection of ABAQUS sound solid coupling algorithm simulation by submarine underwater explosion load the function of dynamic response.(2)This paper introduces the basic theory of underwater explosion and research methods. This paper focuses on the formation mechanism of the underwater explosion shock waves and bubble impulsion and discuss the different effects of the submarine structure.Then the paper analysis the current problems of underwater explosion study several methods.According to own research conditions, we use the ABAQUS softare to research the dynamic response of a submarine underwater explosion load.(3)This paper introduces the advantage of ABAQUS software in the calculation of underwater explosion,and expounds the underwater explosion software technology theory foundation:acoustic fluid basic equations,boundary conditions and the calculating formula of pressure field. in this paper uses ABAQUS to carry out on the plates subjected to underwater explosion loading.The results are compared with experimental results,discuss the applicability of the fimty element soflwares which simulate the non-contact uoderwatcr explosion loading.Take one submarine as research Object, based on the analyzes of shock loading dynamic response,three new impact resistant nonpressure structure are designed;their dynamic response in different shock environment is investigated,comparison of the traditional structure of the submarine.(4)Using different fiber reinforced materials,design for the composite laminated structure the pressure-tight shell,and based on the the pressure-tight shell submarine tank section model numerical simulation, and the results show that the compound material sandwich structure to reduce the shock response, absorb the impact energy by aspects as the traditional steel structure housing. For the final analyze the effect of composite fiber layer direction to impact resistance.