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Sensitivity of lumped constraints using the adjoint method
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Akgun, Mehmet A. Wu, K. Chauncey Haftka, Raphael T. Walsh, Joanne L. |
| Copyright Year | 1999 |
| Description | Adjoint sensitivity calculation of stress, buckling and displacement constraints may be much less expensive than direct sensitivity calculation when the number of load cases is large. Adjoint stress and displacement sensitivities are available in the literature. Expressions for local buckling sensitivity of isotropic plate elements are derived in this study. Computational efficiency of the adjoint method is sensitive to the number of constraints and, therefore, the method benefits from constraint lumping. A continuum version of the Kreisselmeier-Steinhauser (KS) function is chosen to lump constraints. The adjoint and direct methods are compared for three examples: a truss structure, a simple HSCT wing model, and a large HSCT model. These sensitivity derivatives are then used in optimization. |
| File Size | 70177 |
| Page Count | 12 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20040086820 |
| Archival Resource Key | ark:/13960/t72v7gp2b |
| Language | English |
| Publisher Date | 1999-01-01 |
| Access Restriction | Open |
| Subject Keyword | Aircraft Design, Testing And Performance Isotropy Wings Lumping Supersonic Transports Buckling Displacement Loads Forces Trusses Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
