MODELING AND ANALYSIS METHOD ON CRASHWORTHINESS OF CIVILIAN AIRCRAFT FUSELAGE STRUCTURES

摘要

In the paper, numerical simulations of an aircraft fuselage structure with 3-D human body models are performed to study its crashworthiness and passengers' security with the dynamic simulation method. For civilian aircraft fuselage structure with four human body models, finite element model is established and compared with the safety standards to do evaluation for the purpose of improving the aircraft design and occupant's survivability chances in a survival accident. It is found that a reasonable weaknesses setting on the fuselage structure and elastic rebound movement of the fuselage frame are advantageous in the energy absorption during the impact process. Meanwhile, the pelvis load is on the most severe level in all damage data which can be measured by the floor deformation efficiency and reducing occupant's head down and up oscillation frequency is better to decrease the head injury criterion of HIC.