Abstract
The purpose of this work is to use level set topology optimization to improve the design of a representative wing box structure for the NASA common research model. The objective is to minimize the total compliance of the structure under aerodynamic and body force loading, where the aerodynamic loading is coupled to the structural deformation. A taxi bump case was also considered, where only body force loads were applied. The trim condition that aerodynamic lift must balance the total weight of the aircraft is enforced by allowing the root angle of attack to change. The level set optimization method is implemented on an unstructured three-dimensional grid, so that the method can optimize a wing box with arbitrary geometry. Fast matching and upwind schemes are developed for an unstructured grid, which make the level set method robust and efficient. The adjoint method is used to obtain the coupled shape sensitivities required to perform aerostructural optimization of the wing box structure.
Original language | English |
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Title of host publication | 10th AIAA Multidisciplinary Design Optimization Conference |
Publisher | AIAA |
Pages | 1-21 |
Number of pages | 21 |
ISBN (Electronic) | 978-1-62410-310-0 |
DOIs | |
Publication status | Published - 10 Jan 2014 |
Event | 10th AIAA Multidisciplinary Design Optimization Specialist Conference - SciTech Forum and Exposition 2014 - National Harbor, MD, United States Duration: 13 Jan 2014 → 17 Jan 2014 |
Conference
Conference | 10th AIAA Multidisciplinary Design Optimization Specialist Conference - SciTech Forum and Exposition 2014 |
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Country/Territory | United States |
City | National Harbor, MD |
Period | 13/01/14 → 17/01/14 |
Bibliographical note
This work is funded by the Fixed Wing project under NASA’s Fundamental Aeronautics Program. The authors would like to thank Dr. Maxwell Blair for his example DLM code and the Numerical Analysis Group at the Rutherford Appleton Laboratory for their FORTRAN HSL packages.Keywords
- Topology Optimisation
- Angle of Attack
- Aerodynamic Force
- Semi Monocoque
- Unstructured Grid
- Courant Friedrichs Lewy
- Wing Box Structure
- Finite Element Analysis
- Level Flight
- Fast Marching Method