瞬时湿表面波浪增阻修正方法研究

Correction for the Instantaneous Wetted Hull in Calculating Wave Caused Added Resistance

频域中假设入射波和船舶运动同时为简谐的情况下,由于船体表面的非线性,一个周期内瞬时湿表面上的平均佛汝德克雷洛夫(Froude-Krylo,FK)力与平均湿表面上的FK力有所不同。对此,在运用切片法计算船舶运动的基础上,进行瞬时湿表面上平均FK力的计算得到修正的船舶运动,进而计算波浪增阻,并与平均湿表面情况下的计算结果及试验结果进行对比。对比结果表明,考虑简单瞬时湿表面时,波浪增阻预报精度有所提高。

When both incident waves and ship motion are harmonic, the mean Froude-Krylo（FK） forces obtained on instantaneous wetted hull and that obtained on the mean wetted hull are different due to nonlinear ship hull. This paper presents calculation results of FK forces on instantaneous wetted hull with STF method. And then added resistances due to waves are calculated after ship motion modified. The calculation results given instantaneous wetted hull and mean wetted hull compared with the experimental results. The comparison shows that the accuracy of added resistance calculation is improved by considering the Instantaneous Wetted Hull.