本文主要以三維勢流理論（potential theory），假設流體為無黏性、非旋性、以及不可壓縮的理想流體，來探討頻率領域中，不考慮興波穩態效應下，三體船在規則波浪中之運動、以及其結構所承受之波浪負荷（waveload）。
　　首先，以三維脈動型源點（pulsating source）所得之格林函數（Green Function）來建立數學模型；再配合小板法（panel method）技巧之運用，來解析、計算單位船殼表面承受之流體機械力（hydromechanic force）、慣性力（inertia force）等，進而先求得非穩態問題（unsteady problem）之三體船船體運動。
　　然後，將整個船體視為一自由樑（free-free beam），將已計算出之船殼表面受力加以積分，配合其六度運動量加以修正，即可算出船體各處所受的剪力（shear force）、彎矩（bending moment）、扭矩（torsion moment）等波浪負荷。
　　此外，本論文亦將數值分析之運動結果與其他論文之實驗值做比較，來驗證數值方法分析之正確性。根據數值結果來看，佛勞數（Froude Number）越小與實驗值越接近；依本文數值分析與實驗結果比較，可看出本方法預估船體運動已有相當不錯的結論，惟在高速下某些狀況中有較大的差距。
　　另外，本文亦提供三體船在入射波波向角為0、45、90、135、180度等狀況下、以及不同之副船體配置下，船體運動及波浪負荷之比較，以研究三體船結構分佈與運動、波浪負荷的關係。

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