The New Naval Vessel Resisting Breakage Structure

Take a wide view over human sea-fight history, it transited cold-weapon battle, close-quarters-fire fight and transhorizon fight. After world war II, human science technical developed rapidly. The weapon got great advancement, as the appearance of precise guidance bomb, anti-ship missile radical changed the sea fight pattern. It was an important characteristic that a great variety of missiles was used during the modern war. Presently, the naval forces most equipped with missile weapon, which became primary threaten to war vessels.The longitudinal strength of ship was an important guarantee to ship's security. The norms had definite specification of the ship's longitudinal strength. The naval ship especially in first large-scale surface vessel, had more strict stipulates over the ship's longitudinal strength. It was universal to study ship's longitudinal strength by using the finite element-method. ANSYS, PATRAN, NATSTRAN and so on were common finite element softwares. After several tens of year's developing, finite element method had been widely used in structural designing, airplane designing, ship designing and so on.Ship hull's torsion problem wasn't as important as ship hull's longitudinal bending. As missile-vertical-launcher hatch and bomb crevasse in war vessel would weaken ship hull's torsional stiffness, it was full necessary to study naval vessel's torsional strength. The thin walled beam theory and finite element theory were primary theory to study ship's torsional strength.Ship hull's stability problem was concerned by scholars, and the ship norms had detailed specification on it. In the general situation, checking ship hull's stability was computing ship hull's critical stress by vessel norm. In this paper, I researched ship construction members' longitudinal stability and torsional stability by thin-wall construction mechanics.