For commuter aircrafts, as well as for light aircrafts and helicopters, the subfloor represents the structure that has to absorb great part of energy during a crash. Consequently, the subfloor has to be designed so as to limit the deceleration forces by stable crushing and to provide a post-crash structural integrity of the cabin floor. This paper presents a retrofit design of a subfloor structure for commuter aircrafts. The subfloor concept is developed to improve the crash safety and consists in adding to a conventional aluminum structure crushable elements made of foam-blocks. The finite element simulation of a 9 m/s vertical impact onto a rigid surface shows that the acce1erations in correspondence of the seals and the occupants are limited to 22 g, in comparison to the 33 g of the original configuration. So, the maximum acceleration results 33 % lower than the maximum one measured on the conventional subfloor. Also the floor buckling and the seal detachment are significantly reduced.


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    Title :

    Development of a crashworthy subfloor concept for a commuter aircraft


    Additional title:

    Entwicklung eines energieabsorbierenden Unterflurkonzeptes für ein Commuter-Flugzeug


    Contributors:
    Bisagni, C. (author)


    Publication date :

    2003


    Size :

    4 Seiten, 5 Bilder, 6 Quellen




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Retrofit design of a crashworthy subfloor for a commuter aircraft

    Bisagni, C. | British Library Conference Proceedings | 2003


    Crashworthy Design of Aircraft Subfloor Structural Components

    C. Kindervater / H. Georgi / U. Koerber | NTIS | 1988


    DEVELOPMENT OF A CRASHWORTHY COMPOSITE FUSELAGE CONCEPT FOR A COMMUTER AIRCRAFT

    Wiggenraad, J. F. M. / Santoro, D. / Lepage, F. et al. | British Library Conference Proceedings | 2001