本文研究主要目的，為經由理論分析與船模阻力試驗的結果，探討船舶在吃水與俯仰作調整改變時，其興波阻力與穩度之影響，以得出最佳節能之航行姿態，提供操船者有利於安全與節能之較佳選擇。
　　本研究分別採用貨櫃船(C_b=0.65)、油輪(C_b=0.85)及散裝貨輪(C_b=0.60)此三種不同方塊係數之船型做分析比較，又三種船型各以兩種排水量狀況來做分析，而且每種排水量狀況(設計吃水、淺吃水)分別各有三種裝載俯仰船況(平浮-Evenkeel、艏俯-Trim by Bow、艉俯-Trim by Stern)。本研究之試驗部分，採用貨櫃船及油輪兩種船型，是利用本系之拖航水槽進行阻力試驗以得出船模總阻力值，再以阻力預估法進行實船阻力預估及興波阻力推估。在理論分析部分，利用計算流體力學軟體SHIPFLOW得出興波阻力，其中為了討論更多之船型，散裝貨輪一併以數值計算來作比較，可得趨勢幾乎吻合，且於中高速度域計算之數值大致相近。
　　以本文分析之三種船舶而言，散裝貨輪於深吃水船況下，艏俯具較佳之節能狀況；淺吃水船況下，則艉俯具較佳之節能狀況。貨櫃船於深吃水船況下，低速時，艏俯具較佳之節能狀況，而隨著船速之增加，則船況則由平浮至艉俯時具有較佳之節能狀況；淺吃水船況下，艏俯具較佳之節能狀況。油輪於深、淺吃水船況下，皆在平浮至艉俯時具有較佳之節能狀況。而船舶在不同航行姿態下之穩度變化並不大，故欲改變船舶航行姿態來有效降低推力時，船舶仍於穩度安全範圍內。
　　本篇論文分析方式能確實得出選定之三艘船型於不同航行姿態下之興波阻力值及穩度之變化，進而得出船舶最佳節能之航行姿態，並具實際參考價值。

The study is through the ship model resistance test and theoretical analysis to find out the effect on the wave-making resistance and the stability changed by the different ship sailing attitude for the purpose which the best ship sailing attitude of safety and saving energy.

According to the three block coefficients of ship types, the study includes Container, Tanker and Bulk Carrier. The ship test conditions are two different draught and every draught with three loading attitude. In the ship model resistance test, the study uses the ship model of Container and Tanker to adopt the towing tank and obtain the total resistance of the model ship in the department. Further, based on the method of resistance estimation, the study obtains the total resistance of the full ship and wave-making resistance coefficient. In the theoretical analysis, the study uses the Computational Fluid Dynamics (CFD) software called SHIPFLOW to obtain the wave-making resistance coefficients and to compare them with experimental results. On the other hand, in order to discuss the different types of ship, the study also takes Bulk Carrier into consideration. It shows that the trends are resemble between the numerical methods and experimental methods. Besides, the results are nearly closed in the middle and high speed region.

Moreover, the numerical methods can obtain the wave-making resistance in the different types of ship and sailing attitude. Thus, the results finding the ship sailing attitude of safety and the way of energy-saving is the practical reference.

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