Loading...
Please wait, while we are loading the content...
On improving efficiency of differential evolution for aerodynamic shape optimization applications (Document No: 20040066081)
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Madavan, Nateri K. |
| Copyright Year | 2004 |
| Description | Differential Evolution (DE) is a simple and robust evolutionary strategy that has been provEn effective in determining the global optimum for several difficult optimization problems. Although DE offers several advantages over traditional optimization approaches, its use in applications such as aerodynamic shape optimization where the objective function evaluations are computationally expensive is limited by the large number of function evaluations often required. In this paper various approaches for improving the efficiency of DE are reviewed and discussed. Several approaches that have proven effective for other evolutionary algorithms are modified and implemented in a DE-based aerodynamic shape optimization method that uses a Navier-Stokes solver for the objective function evaluations. Parallelization techniques on distributed computers are used to reduce turnaround times. Results are presented for standard test optimization problems and for the inverse design of a turbine airfoil. The efficiency improvements achieved by the different approaches are evaluated and compared. |
| File Size | 925211 |
| Page Count | 9 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20040066081 |
| Archival Resource Key | ark:/13960/t05x78t49 |
| Language | English |
| Publisher Date | 2004-01-01 |
| Access Restriction | Open |
| Subject Keyword | Aerodynamics Navier-stokes Equation Robustness Mathematics Wings Algorithms Aerodynamic Configurations Parallel Computers Shape Optimization Airfoils Mathematical Models Parameter Identification Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
