Optimizing Hull Surface

• Main Authors: Chia-Hung Chou, 周家宏
• Other Authors: Cheng-Hung Huang
• Format: Others
• Language: zh-TW
• Published: 2002
• Online Access: http://ndltd.ncl.edu.tw/handle/c8myaz

碩士 === 國立成功大學 === 造船及船舶機械工程學系 === 90 === For many engineering problems, the physical quantities can be obtained by using some known boundary conditions. This is the so-called “Direct Problem”. However, there are many physical quantities in the engineering problems that can not be measured or calculated directly, we should use some measurement information to estimate them. This is the so-called Inverse Problem. Something the technique of Inverse Problem can be use in Inverse Design Problem. The direct problem for ship fluid dynamics involves the determination of the hull surface pressure distribution and resistance when the hull form is given. On the other hand the inverse design problem is concerned with the determination of the modified hull form from the given desire pressure distribution. The present work addresses the development of FLOWTECH and an efficient method for parameter estimation, i.e. the Levenberg-Marquardt algorithm, in estimating the new hull form that satisfies the desired pressure distribution. The Levenberg-Marquardt method has proved to be a powerful algorithm in inverse calculations especially in parameters estimation.