本文主要是利用三維源點分佈法於時程領域中，來模擬穿浪型雙體船於縱波中之運動。穿浪型雙體船是於一般雙體船中增加一中央船體，當船體在大運動之狀況下，中央船體適時提供一恢復力，以期達到降低雙體船之縱搖運動反應。
文中使用小板法並以三維脈動型源點求解該船於頻率領域下，不同吃水深度之各項流體動力係數，再將求得之各項流體動力係數分別整合成一隨吃水變化之資料庫函數。接著利用四階Runge-Kutta數值解，模擬出該船於時程領域下之起伏與縱搖運動；並將該船之中央船體移除，比較該船有無中央船體之運動，以探討中央船體之實際作用。

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.

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