在船舶構型設計過程中，首先必須建立船舶運動性能評估能力，其中有關船體阻力與耐波性能計算更是不可或缺的重要項目，而為探討船舶運動阻力及其周遭流場變化情形，本研究將以雙體船執行船舶運動流場模擬。在研究過程中，首先將船體設定為固定姿態，並採用標準k- 紊流模式進行船舶相對運動流場模擬，接著再運用層移網格技術執行船舶絕對運動流場模擬；此外，本研究進一步將船體以含括俯仰、起伏之運動模式執行船舶相對運動流場數值模擬，以探討船體姿態變化對船舶阻力之影響。本研究運用數值方法所取得之計算結果與實驗值相近，具有良好的可靠性，相關研究成果與方法將可提供船舶設計者作為預測船舶阻力的有效分析工具。

In the process of ship configuration design, the capability to compute hull resistance and wave load related to evaluate the performance of ship are important. In order to explore the resistance of ship motion and the variation of its surrounding flow field, this study carried out the simulation of flow field for catamaran. In the research process, the hull posture was first fixed, and the standard k-ε turbulence model was used to simulate the relative motion flow field of the ship. Then this study employed the laying mesh technique to perform the numerical simulation of absolute motion flow field of the ship. In addition, this study further used the ship including pitch and heave motion model to simulate the relative motion flow field of the ship, and to explore the influence of the hull posture changes on the ship resistance. The numerical results obtained by this study are similar to the experimental data, which have good reliability. The relevant research results and methods of this study can provide ship designers as an effective analysis tool for predicting ship resistance.