本研究主要目的是透過模擬與試驗，針對圓舟必型和硬舟必型二種不同舟必型穿浪式雙體船進行阻力預估，再利用數據結果判讀其阻力性能，並且從中探討兩者阻力差異來源，做為日後雙體船設計的參考依據之一。
本研究主要分為三個部分：船模阻力模擬結果與比較、船模阻力試驗結果與比較、試驗與模擬比較討論。程序上先以模擬方式預估阻力分布位置及趨勢，再透過成大拖航水槽進行一系列的阻力試驗，最後兩種方法交互驗證比對，確立二艘穿浪式雙體船的差異。
在第一部分，說明本研究使用的數值模擬軟體OpenFOAM，以及本文設定的參數值，如邊界條件、紊流模型，除此之外導入網格獨立性分析及不確定性分析，來佐證模擬計算結果的收斂性；模擬將分為三種類型：原始姿態、固定姿態、自動姿態，利用這些結果預估阻力和姿態變化的分布，再進行第一次的比較並探討兩者差異原因為何，最後做出數值模擬部分的小結。
在第二部分，說明本研究的船模試驗配置流程、試驗推估組力的方法為何，以及試驗儀器介紹，如導船器、夾船器、力計；利用試驗得到的阻力與姿態結果，探討兩者在試驗中阻力差異發生的原因，最後進行第二次比較並做出試驗小結。
在第三部分，綜合上述將模擬與試驗結果比較，驗證並確立二種不同舟必型的穿浪式雙體船，其個別的阻力性能為何，最後進行第三次比較做出結論；而另外此部分也將探討模擬與試驗數據之間的差異及趨勢，做為日後船模阻力數值的參考資料。

關鍵字：穿浪式雙體船、圓舟必型、硬舟必型、OpenFOAM、阻力性能

The main purpose of this research is to estimate the resistance of two different wave piercing catamarans through simulation and experiment, which are divided into round bilge and hard chine. We use the data results to determine which has the better resistance performance, and explore the source of the difference in resistance between the two. It will be one of the references for catamaran design in the future.
This research is mainly divided into three parts: (1) ship model resistance simulation results and comparison, (2) ship model resistance test results and comparison, (3) compared of simulation data and experiment date. First we use the numerical simulation software OpenFOAM to predict the resistance distribution position and trend. Second we make a series of resistance tests by towing tank in the National Cheng Kung University. Finally the two methods were interactively verified and compared to establish the pros and cons of the two wave piercing catamarans.
In the first part, we would explain basic theory of OpenFOAM which was used in this research, and some parameter values of setting, suah as boundary conditions, turbulence model, etc. In addition to importing mesh independence analysis and uncertainty analysis to support the convergence of the simulation calculation results. Simulate model will be divided into three types: original attitude, fixed attitude, automatic attitude, then use these results to estimate the distribution of resistance, sinkage and trim. We would make first comparison and discuss the results what are the reasons for the differences between ships. Finally we would make simulation summary.
In the second part, we would explain the test configuration process of this research and the method of ITTC 2D. We would introduct the test instruments, suah as guide, clamp, force gage, etc. Using the resistance and attitude results which was obtained from the test to discuss the reasons of the differences between ships. Finally we would make the second comparison and experiment summary.
In the third part, combining the above simulation and experiment results, we would verify their individual resistance performance. Then we would make the third comparison and conclusion. This part will also discuss the differences and trends between simulation and experiment data as a reference for wave-piercing catamaran design in the future.

Key words: Catamaran, Ship Resistance test, OpenFOAM, Round bilge, Hard chine

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