C. Kindvater, M. Lützenburger

Based on the MBB/Kawasaki BK 117 a composite airframe was designed, manufactured, and flight tested at MBB Helicopter, Munich. Within the development programme evidence was given to the crashworthy design of the fuselage which was accomplished by a joint activity between MBB and DLR. Results from crash-testing of subfloor components were used at DLR for the development of a 2-dimensional KRASH model of the composite airframe for further parametric crash impact studies. Specific evidence was given to the mass distribution of the helicopter KRASH-model. Computer managed algorithms were developed to concentrate the identified mass locations to certain structural positions and to balance the model automatically to certain prediscribed criteria such as overall C.G. position, total mass and moments of inertia. Also the handling of the tremendus amount of output data was facilitated. Crash cases with various vertical impact velocities up to 7.9 m/s (26 ft/s) and pitch attitudes within -5° and 15° were studied. The pilots injury potential and the use of crashworthy seats were considered. With a modified KRASH-model a full-scale crash test performed at Kawasaki in Japan in 1985 wilh a metal airframe was simulated. The simulated and tested crash condition was a combined impact with a horizontal velocity of 12.6 and a vertical velocity of 9 m/s (resultant: 15 m/s).

DGLR-Symposium, Juni 1991, Bremen

Conference Paper

englisch

14,8 x 21,0 cm, 28 Seiten

DGLR-Bericht, 1991, 1991-04, Leichtbaustrukturen unter kurzzeitiger Beanspruchung (Impact, Crash); S.206-233; 1991; Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V., Bonn

NA

faserverbundwerkstoffe, impact damage

Bestellbar

1991