本文運用截片理論與源點分佈法，配合物體表面邊界條件，來解析船舶航行於縱向波中前進時的非線性流體動力。如：平均附加阻力。本文中假設流體為非旋性、不可壓縮且為無黏性的理想流體，嘗試以時程領域並加入準平均附加阻力之觀念來探討船舶在縱向波中運動時，船舷外傾形狀對於船舶附加阻力的影響。
一般而言，在頻率領域下無法估算船體因吃水改變後的瞬時運動與非線性力，所以利用基於四階Runge-Kutta方法的時程領域來解決頻率領域無法計算的部份。為了求得每瞬時水面下的形狀，來符合源點分佈法所需之源點，故導入了B-spline方法來解決因每瞬時水面下的船體形狀改變而必須每瞬時給予新的源點問題，而建立一完整之時程領域模擬方法來分析。另船舷外傾形狀對於船體相對波高的影響也一併加入探討。
根據本文研究解析之結果，船舷外傾角度如果越大其附加阻力就會越大，而船舶相對波高則是會降低，因此如船舶航行於大振幅波大運動的海況下，其效應會很明顯，設計時應加以注意。

The main purpose of the paper is to investigate the effect of the bow flare on the added resistance and relative elevation for the ship advancing in longitudinal reqular waves. In the present paper, the strip theory and source distribution method are applied to solve the corresponding boundary conditions and analyze the nonlinear motions and the nonlinear hydrodynamic forces, i.e. the mean added resistance. Because the general frequency domain method cannot calculate the instantaneous ship motion and nonlinear forces, the time domain simulation technique based on the 4th Runge-Kutta method is therefore applied here to solve the instantaneous mean added resistance for a ship with different bow flare respect to the different draft. In order to find the instant hull shape below the free surface, the B-spline theory is also applied to calculate the required input source data points for the source distribution method at any instant time with respect to the different draft. The relative elevations near the bow flare are also investigated for discussions. The present results shows that the larger the bow flare, the larger the mean added resistance and the smaller the relative wave elevation, especially for large wave amplitudes.

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