A Study And Analysis Of The Human Impact Dynamic Responses Based On STOBAR

Many important naval battles in the Second World War, aircraft carrier showed powerful effectiveness, so obtained the throne of "the main of naval battle". After the Second World War, aircraft carrier also plays a decisive role at the local war. The aircraft carrier becomes the main of naval battle, because the key rest with its unique weapon equipment-shipboard aircraft. The carrier aircraft landing need arresting gear so that it can landing stop in the shortest possible time. The carrier aircraft landing process is considerd dangerous link. The moment of carrier aircraft landing, the arresting hook catch the arresting cable obstacle and produce powerful impact so that the pilot receive nonlinear metabolic acceleration load. And the pilot is caused seriously bodily injury, especially trunk and head-and-neck, etc. According to the statistics, about 70% carrier aircraft pilots have head-and-neck injury, thus lead to ground an average of three flying days. It caused serious economic losses and affected the normal flight training.With the wide application of computer, finite element model simulation method become the most commonly used method in biomechanical study process. According to the present situation, pilot is injury prone at the plane from landing. This paper uses the pilot as the research object. Selected a man as volunteers for modeling material, whose height is 175 cm and weight is 65 kg. Through the spiral CT scanning generation the image data, this is used establishing follow-up finite element model. Application Mimics conduct image visualization; application Geomagic software conduct model optimization and cured surface piece division; application TrueGrid conduct meshing and get finite element model. The model established the upper part of the body tissue and simple seat. The human tissue including:skull, brain tissue, cervical vertebra, clavicle, scapula, thoracic vertebra, rib, costicartilage, intervertebral discs, sternum and important muscle and ligament. The whole model is described as 161669 nodes and 113930 elements, which mainly use the hexahedron and cable element. The Japanese vehicle research institute (JARI) volunteers test data of rear collision is applied in LS-DYNA for impact dynamics simulation. The simulation results have verified the validity of the finite element model.The effective finite element model is applied in impact dynamic simulation of aircraft landing process from human body. It is concluded that the human tissue response results and the response results were analyzed. Analysised response results indicated that all of the stress of the thoracic vertebrae Tl is the largest. The largest strain in cervical Cl place and easy to produce the damage; the clavicle and third rib susceptible to fracture; the stress and strain of the intervertebral disc between C7 and T1 is the largest and easy to produce the intervertebral disc injury. According to the simulation results combined with currentclinical results to prediction and analysis the pilot damage. Finally, the paper puts forward some effective protective measures for reducing the pilot damage.