Numerical optimization of process control variables for the Bridgman casting process
| Autor: | F. Hediger, G Laschet, P.R. Sahm, Norbert Hofmann, S Olive, J Wolf |
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| Rok vydání: | 1997 |
| Předmět: |
Materials science
Turbine blade business.industry Control variable Mechanical engineering Condensed Matter Physics Casting Computer Science Applications law.invention Finite element simulation Software Mechanics of Materials law Modeling and Simulation Process control General Materials Science business Evolution strategy Gradient method |
| Zdroj: | Modelling and Simulation in Materials Science and Engineering. 5:23-34 |
| ISSN: | 1361-651X 0965-0393 |
| DOI: | 10.1088/0965-0393/5/1/002 |
| Popis: | Specific objective functions and algorithms are presented, which by means of dedicated finite element simulation software, calculate optimized control variables for an industrial Bridgman casting furnace. A gradient method and an evolution strategy have been integrated into an efficient optimization tool in order to minimize an objective function which characterizes the quality of directional solidified (DS) or single crystal (SC) turbine blades. The goal is to minimize the manufacturing costs for a desired quality. For a dummy turbine blade geometry, the macrograin structures produced by the optimized withdrawal velocity profile and an equivalent constant velocity, which had the same total process time, are compared. This comparison shows that the developed optimization techniques are applicable to the casting of DS/SC turbine blades. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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