J.L. Pérez-Galán, A.M. Strömberg, H. Climent

Bird strike has always posed a very real threat to aircraft. The significance of this threat has led to it being considered in aircraft design and the enforcement of bird strike integrity requirements by airworthiness authorities around the world. Traditionally aircraft manufacturers have relied on experimental bird strike tests for design and certification of aircraft due to the complexity of high velocity impact, which makes numerical analysis difficult. With the development of computers and FEM methodologies, numerical analyses have became a valuable and useful tool in the structural design and a complement with the bird strike test campaigns. In this paper, a stochastic methodology, recently developed, implemented and validated by EADS-CASA (within the European Community Technical Program "CRAHVI") on the problem of high velocity impact/crashes on aeronautical structures, is applied for the design improvement of an airliner HTP leading edge from the point of view of bird strike. Stochastic analyses, using the Monte Carlo Simulation method based commercial tool ST-ORM 2, running numerical simulations, using the explicit code PAM-CRASH 3, were performed to cover such scenario. In addition to the A340 HTP LE stochastic design improvement, performed within CRAHVI as an exercise to validate the methodology, this has been applied recently in other two real cases: during the last design phase of the Falcon-7x (now the design phase is finished and the component is manufactured), and at the first design phase of the A400M (the analysis will be repeated in successive design phases until the aircraft certification). The analysis results prove that this stochastic methodology is suitable and useful for industrial application to highly non-linear impact problems like bird strike.

International Forum on Aeroelasticity and Structural Dynamics, 2005, München

Conference Paper

englisch

21,0 x 29,7 cm, 16 Seiten

DGLR-Bericht, 2005, 2005-04, International Forum on Aeroelasticity and Structural Dynamics 2005; S.1-16; 2005; Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V., Bonn

NA

in getr. Zählung;

simulation, bird-aircraft collisions

Bibliothek

2005