The modal-based structural optimization method was extended to allow the expansion of the modal database with static modes calculated during the design process. The expanded basis improves the accuracy of the modal approach and yields asymptotic convergence to the exact discrete-coordinate design. The improvements enhance the performance of the modal-based ASTROS module as an online multidisciplinary design tool. The composite wing case studies were with relatively large number of design variables (78 and 174). They were indicative that the modal approach to aeroelastic design has great potential in the preliminary design of aircraft for which answers to what-if-type questions are needed in short order. The modal approach is accurate to produce results quite similar to those of the discrete approach, not only in terms of system behavior but also in consistent design concepts.
Structural optimization with static aeroelastic and stress constraints using expandable modal basis
Optimierung von Strukturen unter statischer aeroelastischer Beanspruchung unter Nutzung einer erweiterbaren Modaldatenbank
AIAA Journal ; 37 , 11 ; 1514-1519
1999
6 Seiten, 8 Bilder, 3 Tabellen, 17 Quellen
Aufsatz (Zeitschrift)
Englisch
Structural Optimization with Stress and Aeroelastic Constraints Using Expandable Modal Basis
British Library Conference Proceedings | 1996
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