The time domain motion analysis of the wave piercing catamaran ship in longitudinal wave by three-dimensional theory

• Main Authors: Shou-ping Yen, 顏守平
• Other Authors: Ming-chuan Fang
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/20683108965540219575

碩士 === 國立成功大學 === 系統及船舶機電工程學系碩博士班 === 97 === In this study, the three-dimensional source distribution method in time domain was used to simulate the motions of the wave-piercing catamaran ship in Longitudinal waves. The wave-piercing catamaran ship is a catamaran ship with a central bow hull body. The central bow hull body can provide extra restoring force and hydrodynamic force to reduce the pitch motion in large waves. The three-dimensional pulsating source based on panel method is used to calculate the related hydrodynamic coefficients with respect to different drafts in the frequency domain, which can be applied to establish the data base for time domain calculation by 4th Runge-Kutta method. From the comparisons with the conventional catamaran ship, we find that the central bow hull body of wave-piercing catamaran ship works well at some specific wave frequencies, especially while pitch and heave motions are large. Therefore the validity of the central bow hull body of the wave-piercing catamaran ship can be proved.