Research On Underwater Explosive Structural Security Of Large-scale Warship

The surface warships especially the large-scale surface warships take an important part in every naval battle. The instructional meaning of doing research on the reliability safety of the large-scale surface warships in underwater explosion condition to improve the vitality and fighting strength of warships is very important. Numerical simulation method is used to check the reliability safety of the surface warships in underwater explosion condition, and also the characteristics of the large-scale surface warships are analyzed. The contents are as follows:1. Review the developments and relevant researches in the field of warship's anti-shock performance of our nation and other nations, and then discuss the research actuality of our nation and the anti-shock techniques which need to be resolved. Especially for warships, the standards of our nation feature to evaluate the anti-shock performance of warships have not come into being, and the scale and system have not been formed which needs to do further research. However, as more attention is attached into the anti-shock performance of warships and the research procession is under tougher training, the anti-shock technique of warships in our nation has been promoted by researching into the real ships subjected to underwater explosion.2. Based on the finite element model of the large-scale warship typical compartments, 50 work conditions are set up to calculate its anti-shock performance. The powder is set in different detonator distances, attack angles and powder weight. The structural responses are studied along with the detonator distances, attack angles and powder weight, and these three conditions are compared and analyzed. 3. Compared to different standards, damage grades of the large-scale surface warships are evaluated according to national military standard to get the safety radius, critical radius and damage radius of the large-scale surface warships.4. The characteristics of special construction of the large-scale surface warships are researched under the action of the explosive shock performance, especially the characteristics of the anti-explosion and anti-shock performance of the multilayer shipboard protective structure and the low-pass filter effect of the multilayer deck of the large-scale surface warships are analyzed. Through the characteristic analyze of the large-scale surface warships construction under the action of the explosive shock performance, the function of the shipboard protective accommodation to the shipboard protective structure is got. At the same time, the low-pass filter effect of the multilayer deck of the large-scale surface warships is discussed by power spectral density analyzing method, and this method can offer reference for the research of the anti-explosion and anti-shock performance capability of the large-scale surface warships.