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Internal structural design of the common research model wing box for aeroelastic tailoring
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Stanford, Bret K. Wieseman, Carol D. Jutte, Christine V. |
| Copyright Year | 2015 |
| Description | This work explores the use of alternative internal structural designs within a full-scale wing box structure for aeroelastic tailoring, with a focus on curvilinear spars, ribs, and stringers. The baseline wing model is a fully-populated, cantilevered wing box structure of the Common Research Model (CRM). Metrics of interest include the wing weight, the onset of dynamic flutter, and the static aeroelastic stresses. Twelve parametric studies alter the number of internal structural members along with their location, orientation, and curvature. Additional evaluation metrics are considered to identify design trends that lead to lighter-weight, aeroelastically stable wing designs. The best designs of the individual studies are compared and discussed, with a focus on weight reduction and flutter resistance. The largest weight reductions were obtained by removing the inner spar, and performance was maintained by shifting stringers forward and/or using curvilinear ribs: 5.6% weight reduction, a 13.9% improvement in flutter speed, but a 3.0% increase in stress levels. Flutter resistance was also maintained using straight-rotated ribs although the design had a 4.2% lower flutter speed than the curved ribs of similar weight and stress levels were higher. For some configurations, the differences between curved and straight ribs were smaller, which provides motivation for future optimization-based studies to fully exploit the trade-offs. |
| File Size | 1583771 |
| Page Count | 48 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20150003788 |
| Archival Resource Key | ark:/13960/t54f6sn44 |
| Language | English |
| Publisher Date | 2015-03-01 |
| Access Restriction | Open |
| Subject Keyword | Aircraft Design, Testing And Performance Dynamic Structural Analysis Structural Design Reinforcement Structures Aircraft Design Design Analysis Design Optimization Wings Ribs Supports Weight Reduction Flutter Analysis Nastran Aeroelasticity Leading Edges Stringers Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
