Research On Dynamic Response Of Warship Structure Under Explosion Loading In The Air

With the rapid development of the modern weapons technology, the large surface ship that plays in modern wars is becoming more and more important. The warship inevitably suffers menace from aerial enemy anti-warship weapons in a battle. It is a tremendous challenge to the survival of the warship that the breakage of anti-warship weapons is very big. Therefore, it is important for the existent ability of warship increasing the shock resistance of warship. So the research on the dynamic response of warship under explosion loading in the air provides the reference for increasing the shock resistance of warship.On the base of XXX surface ship structure, the structural dynamic response of the large surface ship under air contact explosion and air non-contact explosion is researched in detail by the theoretic and numerical methods in the paper. The specific contents are as follows:It is Summarized that the current research state and direction about structural dynamic response under explosion loading in the air from three aspects of theory, experiment and numerical simulation, and the further goal for the following investigation is presented.Based on explosive theory and the assumption that rigid-plastic material is ideal, it is analyzed that the interruption of warship structure to the explosive product and not. And deducing computational formula provides methods for explosion loading in the air. On this basis, combining with the theory of conversation of energy and board deformation, the simple formula about the radius of crevasse of simple board under explosion loading in the air is surmised, and its feasibility of the calculation is ensured.The dynamic response of XXX surface ship structure under explosion loading in the air is calculated by using large-scale non-linear finite element analysis software (ANSY/LS-DYNA). Based on the results of numerical calculation, the breakage of warship structure is analyzed in air contact explosion, and the feasibility of numerical method that calculates the dynamic response of warship structure under explosion loading in the air is proved; On second thoughts, the dynamic response of warship structure under explosion loading is analyzed from two aspects of stress and shock environment; The laws that are summarized provides the reference for increasing the shock resistance of warship.The formation, characteristic and transmission pattern of air non-contact explosion shockwave is introduced. And based on the above research, the dynamic response of warship structure under loading in the air non-contact explosion is calculated from deformation of the structure, energy absorption and shock environment.