Comparisons of the impact performance of a 5 ft diameter crashworthy composite fuselage section were investigated for hard surface, soft soil, and water impacts. The fuselage concept, which was originally designed for impacts onto a hard surface only, consisted of a stiff upper cabin, load bearing floor, and an energy absorbing subfloor. Vertical drop tests were performed at 25 ft/s onto concrete, soft soil, and water. Comparisons of the peak acceleration values, pulse durations, and onset rates were evaluated for each test at specific locations on the fuselage. In addition to comparisons of the experimental results, dynamic finite element models were developed to simulate each impact condition. Once validated, these models can be used to evaluate the dynamic behavior of subfloor components for improved crash protection for hard surface, soft soil, and water impacts.
Multi-terrain impact tests and simulations of an energy absorbing fuselage section
Auprallprüfung in verschiedenen Geländen und Simulation einer energiebsorbierenden Rumpfsektion
Journal of the American Helicopter Society ; 52 , 2 ; 159-168
2007
10 Seiten, 21 Bilder, 18 Quellen
Article (Journal)
English
Hubschrauber , Rumpf , Aufprall , Sinkgeschwindigkeit , mathematisches Modell , numerische Simulation , Finite-Elemente-Methode , Programmsystem , Untergrund (Oberfläche) , Aufpralluntersuchung , Beschleunigung , Anpressdruck , Energieabsorption , Aufprallenergieabsorptionsvermögen , nichtlinearer Effekt , Mechanik
Multi-Terrain Impact Tests and Simulations of an Energy Absorbing Fuselage Section
Online Contents | 2007
|Multi-Terrain Impact Testing and Simulation of a Composite Energy Absorbing Fuselage Section
British Library Conference Proceedings | 2004
|Multi-Terrain Vertical Drop Tests of a Composite Fuselage Section
British Library Conference Proceedings | 2008
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