Elliptical shells will find a wide application in future aerospace concepts. Because of aerodynamic reasons and aspects of configuration fuselage structures of hypersonic aircraft will have elliptical or quasi-elliptical cross-sections. In consideration of volumetric efficiency it seems to be necessary having tank concepts with elliptical cross-sections, too. As mentioned by the authors in earlier published papers, elliptical shells in contrast with those of circular cross-sections show several stability problems when loaded with internal pressure. Computer programs for structural investigations of shells with non-axisymmetric cross-sections based on the Transfer Matrix Method have been developed. The goal was to have an easy to use and fast running program system which uses well suited substitute models for calculating deflections, loadings, and stability effects. This also offers the possibility of wide range parametric studies in a tolerable amount of time. In the following the theory used, modellization and calculation methods will be shortly introduced. The results achieved will be presented and discussed. On this occasion also comments on structural efficiency of elliptical shells under pressure and some methods to solve stability problems will be given.
Stress and stability analysis of shells with elliptical cross-section
Spannungs- und Stabilitätsanalyse von Zylinderschalen mit elliptischem Querschnitt
Zeitschrift für Flugwissenschaften und Weltraumforschung ; 20 , 2 ; 117-125
1996
9 Seiten, 9 Bilder, 2 Tabellen, 20 Quellen
Article (Journal)
English
Flugzeug , Hyperschallgeschwindigkeit , Querschnitt , Ellipse , Schale (Flächentragwerk) , Zylinderschale , Aerodynamik , Flugzeugrumpf , Stabilität , Innendruck , Spannungsanalyse , Software , Matrix (Zahlenschema) , numerisches Verfahren , Entwurf , Rechenzeit , Integralgleichung , partielle Differenzialgleichung , Verlagerung , Membran , Iteration , Bruchlast , Ausbeulung , Vergleichsmessung , Scherspannung
Stress and stability analysis of shells with elliptical cross-section
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