本研究主要是利用二維源點分佈法於時程領域中，來模擬穿浪型雙體船航行於實際海域中之船體運動。穿浪型雙體船是於一般雙體船之中間增加一中央船體，其主要的設計基本概念為：當船體在波浪中大運動之狀況下，讓中央船體可適時提供一恢復力，以期達到降低雙體船之縱搖運動之反應。但由於遭遇海況與船體反應複雜，此中央船體是否有實際的抗縱搖作用有待進一步的分析探討。
本研究為了使模擬結果能快速達成，使用相當成熟之二維脈動型源點分佈法加以改良，使電腦程式於頻率領域下，在該船具有不同船體數時，如雙體或三體船體，都可快速且方便求解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，其中激盪力之流體動力則依不同之波向進一步處理。數值解是利用四階Runge-Kutta的方法，模擬出該船於不同之海況下之時程領域五度運動；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。本研究所建立的時程領域數值模擬技術將有助於造船設計者對穿浪型雙體船之分析作更進一步的了解。

The present study mainly applies the two dimensional source distribution method to simulate the ship motion of a wave-piercing catamaran ship traveling in the seaway by time domain technique. The basic design concept of the wave-piercing catamaran ship is to install a centre bow hull in the middle part, which is expected to depress the pitch motion in waves by supplying an additional restoring force. However, due to the complexity of the seaway and ship response, the anti-pitch function of the central bow is doubtful and needs further study.
In order to obtain the simulation results rapidly and practically, the present study planned to refine the well-developed two-dimensional pulsating source distribution method to create a computer program suitable for different multi-hull type ship, for example the catamaran ship or the trimaran ship. The computer program can solve the hydrodynamic coefficients with respect to different draft for different multi-hull shape and the related data base of the hydrodynamic coefficients need to be firstly established.
The motion simulations with and without central bow are made for comparisons to investigate the anti-pitch function with respect to different sea states.

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