應用三維遠場法分析斜向波中船舶之漂移力及力矩

The three-dimensional far-field Method Applied to the Analysis of Drifting Force and Moment on a Ship Running in Oblique Waves

余盛富(S. F. Yu)

《高雄海洋科大學報》 22期 (2008/02) Pp. 41-55

https://doi.org/10.6983/KHHYKTHP.200802.0041

摘要

本文是分析一艘船在零速或低速時，受到斜向規則波作用而產生之漂移力及力矩，本研究係採用簡化自由液面條件之三維勢流理論及源點分佈法來計算船體運動，再以遠場法來求解船在有拘束與無拘束狀態時的漂移力及力矩。選取系列60船模為數值計算對象，然後將計算結果與截片法及二維近場法之數值解和實驗值作比較，結果顯示與實驗值的趨勢是一致的，並且也有優於截片理論與近場法之數值解。

關鍵字

三維勢流理論 ； 遠場法 ； 漂移力 ； 漂移力矩

並列摘要

The research aims to make an analysis of the mean drifting force and moment on a ship towed in captive and free condition in oblique regular waves. The 3-D potential theorem with simplified free-surface condition and source distribution technique is used to calculate the ship motion response. A far-field method is adopted to solve the drifting force and moment for both restrained and free running ships. A series 60 model is applied for numerical calculations, and comparisons with experimental data and strip theory and near-field method are made. It shows that the results are generally in good agreement with experimental data and superior to the strip theory and the method with near-field.

並列關鍵字

3-D potential theorem ； far-field method ； drifting force ； drifting moment