The Crash Resistance Research On Aircraft Structure Design

Nowadays, more and more interests are focused on the research of the crash response after many years ignoring because of the limits of internal market dimensions in decades after the crashworthiness standard of commuter aircraft was issued. Most of the commercial aircrafts applied for exemption of it based on considerations of economy, size and weight of crashworthiness seats. With the development of general aviation industry, people are suffering more air accidents, and personal safeties of crews are concerned farther more. Consequently, research on anti-aircraft structures of collisions are increased dramatically, and the structure of anti-aircraft crash collision design requirements, design criteria, key parts of the design, testing tools, simulation methods and so on, are great and rapidly developed. Booming of the internal general aviation industry also perform more pressing market demands. Safeties of crews for both commercial and military aircrafts in the case of forced landing are also considered more important. In the present paper, the crashworthiness technical criteria for the design are analyzed according to standard crashworthiness provisions, crashing conditions and structures, design and test methods are studied, and the crash collision simulation technology are examined, as follows:1. The plane crashing condition while the collision occurred are analyzed, the structure load of the crash collision and the crashworthiness on standardized provisions are studied in details. Different parameters on the requirements of the crashworthiness in different standard are compared. Crash conditions of the N-5 aircraft are proved.2. Kinds of the plane structure collision damage which lead crew damage are analyzed. Criteria of energy absorption to protect the crew against the fuselage structure design are confirmed, and fuselage structures, wing structures of the anti-collision crash design measures are sued.3. Influences of the different seats towards, different ways of connecting to crash safety performance, and the seats structural strength and stiffness of the design requirements are analyzed, according to the crew seat design requirements. Padded energy absorptions on the human body protection are studied. Principles of seat experimental and results confirmed method are brought forward.4. The crashworthiness design demands and crashworthiness features of the type N-5 aircraft are concerned. The crash experiment design and results are illustrated. Transient dynamics simulations for type N-5 aircraft are done and results are compared with the experiment.