The structural analysis of Blended Wing Body (BWB) aircraft configurations is presented in the context of a preliminary aircraft design process with the aircraft design and optimization program PrADO of the IFL. A process is described that enables parametric creation of detailed Finite Element models, its load cases and loads: Iteratively different flight conditions are trimmed and corresponding pressure distributions calculated by the higher-order sub- and supersonic panel code HISSS (EADS-M). Each defined loading condition is used for the iterative structural sizing of the primary structure. Based on Finite Element idealization a mass estimation of all structural masses is performed. The primary and secondary masses are fed back into the closed overall aircraft optimization loop of PrADO until this iterative procedure shows convergence on calculated aircraft variables (e.g. aircraft masses and static engine thrust). Examples of different structural solutions and their integration in the global model are presented for passenger versions of a 700PAX BWB with a special consideration of a pressurized cabin. Structural masses and parametric studies on the influence of the centre body rib spacing are presented and compared by their weight breakdowns.
Representation of structural solutions in blended wing body preliminary design
Darstellung der Konstruktionslösungen im Vorentwurf einer Tragflügel-Rumpf-Konfiguration
2006
13 Seiten, 15 Bilder, 4 Tabellen, 13 Quellen
Aufsatz (Konferenz)
Englisch
REPRESENTATION OF STRUCTURAL SOLUTIONS IN BLENDED WING BODY PRELIMINARY DESIGN
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