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Aeroelastic Tailoring Study of N+2 Low Boom Supersonic Commerical Transport AircraftThe Lockheed Martin N+2 Low - boom Supersonic Commercial Transport (LSCT) aircraft was optimized in this study through the use of a multidisciplinary design optimization tool developed at the National Aeronautics and S pace Administration Armstrong Flight Research Center. A total of 111 design variables we re used in the first optimization run. Total structural weight was the objective function in this optimization run. Design requirements for strength, buckling, and flutter we re selected as constraint functions during the first optimization run. The MSC Nastran code was used to obtain the modal, strength, and buckling characteristics. Flutter and trim analyses we re based on ZAERO code, and landing and ground control loads were computed using an in - house code. The w eight penalty to satisfy all the design requirement s during the first optimization run was 31,367 lb, a 9.4% increase from the baseline configuration. The second optimization run was prepared and based on the big-bang big-crunch algorithm. Six composite ply angles for the second and fourth composite layers were selected as discrete design variables for the second optimization run. Composite ply angle changes can't improve the weight configuration of the N+2 LSCT aircraft. However, this second optimization run can create more tolerance for the active and near active strength constraint values for future weight optimization runs.
Document ID
20150018876
Acquisition Source
Armstrong Flight Research Center
Document Type
Conference Paper
Authors
Pak, Chan-Gi
(NASA Armstrong Flight Research Center Edwards, CA, United States)
Date Acquired
October 7, 2015
Publication Date
June 22, 2015
Subject Category
Structural Mechanics
Aircraft Design, Testing And Performance
Aircraft Stability And Control
Report/Patent Number
DFRC-E-DAA-TN22615
Meeting Information
Meeting: Aviation 2015 Conference
Location: Dallas TX
Country: United States
Start Date: June 22, 2015
End Date: June 26, 2015
Sponsors: American Inst. of Aeronautics and Astronautics
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Keywords
low boom supersonic civil transport
multidisciplinary design optimization
aeroelastic tailoring
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