1. Optimal shape design of multi-element trawl-doors using local surrogate models.
- Author
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Leifsson, Leifur, Hermannsson, Elvar, and Koziel, Slawomir
- Subjects
ENERGY consumption ,COMPUTATIONAL mechanics ,COMPUTATIONAL fluid dynamics ,MATHEMATICAL optimization ,ALGORITHMS - Abstract
Trawl-doors have a large influence on the fuel consumption of fishing vessels. Design and optimization of trawl-doors using computational models are a key factor in minimizing the fuel consumption. This paper presents an optimization algorithm for the shape design of trawl-door shapes using computational fluid dynamic (CFD) models. Accurate CFD models are computationally expensive. Therefore, the direct use of traditional optimization algorithms, which often require a large number of evaluations, may be prohibitive. The proposed approach is iterative and uses low-order local response surface approximation models of the expensive CFD model, constructed in each iteration, to reduce the number of evaluations. The algorithm is applied to the design of a multi-element trawl-doors, involving up to four design variables controlling the angle of attack and the slat and flap position and orientation. The results show that a satisfactory design can be obtained at the cost of a few iterations of the algorithm. [ABSTRACT FROM AUTHOR]
- Published
- 2015
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