Study on the Optimization of Stacking Sequence of High Skew and High Rake FRP Marine Propellers
Date Issued
2004
Date
2004
Author(s)
Hung, Chu-Sung
DOI
zh-TW
Abstract
This thesis investigated the performance of highly-skewed and highly-raked FRP marine propellers with optimization of arranging the stacking sequence.
The application of genetic algorithms(GA) to the stacking sequence of composite laminates has grown in recent years, but GA always takes a lot of time because of huge calculation. To reduce calculation time, we insert a local improvement into GA, and the calculation by finite element analysis is replaced by a regression model. The GA with local improvement is applied to the composite propeller. It converges much sooner than a standard GA and the calculation time greatly reduced. So this thesis uses the improved GA to search for the optimal stacking sequence.
We get the performance and the deformation of FRP propeller by Combining with PSF2, ABAQUS, and the improved GA. The pre-deformed propellers conform to the demands of optimization. Finally, an experiment is made to verify the result of calculation. The performance and the deformation of the propeller are found to be close to the result of the calculation in this study. The pitch of the propeller is reduced when the axial inflow velocity is reduced. The optimized composite material propeller outperforms traditional metal propellers.
Subjects
基因演算法
複合材料
FRP
Genetic Algorithms(GA)
SDGs
Type
thesis