超大型集装箱船全浪向波浪增阻预报技术研究

On Prediction of Added Resistance in Waves for Very Large Container Ship in Any Wave Direction

随着IMO最小推进功率规范的实施和ISO-15016实船测试航速修正方法的修订改版,波浪增阻研究引起广泛关注,成为当前船舶耐波性领域研究的热点和难点。虽然国际上针对迎浪情况的船舶波浪增阻已开展过较为广泛的研究,但对于斜浪和随浪等全浪向中的波浪增阻预报尚未取得突破性进展。该文首先阐述全浪向中的波浪增阻数值计算与模型试验方法,然后针对2万箱超大型集装箱船开展全浪向中的波浪增阻数值计算与模型试验研究。通过与商业软件和荷兰MARIN水池试验结果的比较,证明数值预报方法有效且计算结果优于商业软件、模型试验方法可行。研究成果可用于船舶在全浪向中的波浪增阻预报,进而可用于实船测试航速修正和最小推进功率规范校核等,具有较好的工程应用价值。

With the implementation of IMO Regulation on Minimum Propulsion Power and the revision of the ISO-15016 document concerning the sea trial speed correction method,the study of the added resistance in the waves that arises wide concerns has become one of the hot issues and the difficulties in the current study of the ship sea-keeping performance.Although the added resistance in the head sea conditions has been widely studied internationally,no substantial breakthrough has been made for the prediction of the added resistance in any wave direction,such as in the oblique sea and the following sea,yet.The methods for the numerical calculation and model experiment of the added resistance in any wave direction are firstly introduced.Then the numerical calculation and the model experiment of the added resistance in any wave direction are carried out for the 20000 TEU very large containership.The numerical prediction method is verified and validated by comparison with the results calculated by the commercial software and the experimental results from Maritime Research Institute Netherlands(MARIN).It shows that the calculation results in the current study are more accurate than the results calculated by the commercial software,and the current model experiment method is feasible.The results can be used in the prediction of the added resistance of the ships in any wave direction,and thus the correction of the sea trial speed as well as the check of the regulation on the minimum propulsion power,which can provide good engineering application value.