Crashworthiness assessment is one of the important contents to ensure the safety of civil aircraft. Improving the energy absorption performance of aircraft components is the core issue of the aircraft crashworthiness research. This article is based on PAM-CRASH and analyzes the thin-walled openings of typical aircraft. The impact performance of structural (C-shaped, I-shaped) cross-section members is studied, and the results show that the energy absorption ratio of I-shaped structure is higher than that of C-shaped structure. The introduction of different trigger mechanisms has little effect on the deformation mode, but it can greatly reduce the initial load peak value.
Emergency breakaway design is one of the key technologies in civil aircraft design. Successful emergency breakaway design can better avoid fires and reduce the mortality rate of aircraft accidents. Based on the analysis of the airworthiness and airworthiness clauses, this paper uses the large-scale collision impact simulation software PAM-CRASH to simulate and analyze the emergency breakaway of the civil aircraft pylon. The results show that when the aircraft crashes on the concrete ground at a 10-degree angle of attack with the ground, the design of the pylon fuse pin meets the requirements of emergency breakaway.
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