Kohlgrüber, D. and Vigliotti, A. and Weißberg, V. and Bartosch, H. (2004) Numerical simulation of a composite helicopter sub-floor structure subjected to water impact. AHS 60th Annual Forum, Baltimore, Maryland, USA, 7.-10.06.2004.
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This paper describes recent research activities on the design, numerical simulation and testing of a composite helicopter sub-floor structure with a novel approach to avoid skin breakage in the case of a crash on water. After the analysis of the structural behavior of current sub-floor designs in the case of water crash events IAI and ECD worked on a new design which was supported by numerical simulation work performed by DLR using the explicit FE-codes PAMCRASH. Finally a demonstrator sub-floor box was built to prove the concept in a component test that was performed at CIRA. In this paper the entire study is presented with a focus on the numerical crash simulations and the comparison with the corresponding test results from a purely vertical drop test on water. Finally, the validated simulation approach is used in a sensitivity study to investigate the behavior of the new sub-floor design in load cases with initial pitch and roll angles that could not be tested.
|Document Type:||Conference or Workshop Item (Speech)|
|Title:||Numerical simulation of a composite helicopter sub-floor structure subjected to water impact|
|Keywords:||simulation, modelling, crash, water impact, ditching|
|Event Title:||AHS 60th Annual Forum, Baltimore, Maryland, USA, 7.-10.06.2004|
|Organizer:||The American Helicopter Society|
|HGF - Research field:||Aeronautics, Space and Transport (old)|
|HGF - Program:||Aeronautics|
|HGF - Program Themes:||Aircraft Research|
|DLR - Research area:||Aeronautics|
|DLR - Program:||L AR - Aircraft Research|
|DLR - Research theme (Project):||UNSPECIFIED|
|Institutes and Institutions:||Institute of Structures and Design|
|Deposited By:||elib DLR-Beauftragter|
|Deposited On:||16 Sep 2005|
|Last Modified:||14 Jan 2010 13:26|
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