| Autor: |
Dhanesh Padmanabhan, Raymond M. Kolonay, Ravindra V. Tappeta, Scott A. Burton |
| Rok vydání: |
2002 |
| Předmět: |
|
| Zdroj: |
43rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference. |
| DOI: |
10.2514/6.2002-1710 |
| Popis: |
This paper investigates the application and implementation of an aircraft engine turbine blade reliability-based optimization (RBO). The turbine blade is designed to be minimum volume while satisfying component reliability-based constraints on displacement and stress. Design variables consist of computer aided design (CAD) shape parameters. Uncertainty is introduced via random variable models of material and load parameters. A sequential qaudratic programming (SQP) technique is used in conjunction with first-order reliability theory to design the blade. State-of-the-art CAD techniques are employed to automate and coordinate the necessary finite element analyses required by the optimization and reliability algorithms. Three RBO constraint evaluation techniques are examined: the mean-value (MV) firstorder reliability method, the Hasofer-Lind RackwitzFiessler first-order reliability method (FORM), and a variable-complexity (VC) approach. Computational costs of the different RBO strategies and a discussion of implementation issues are presented. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
