Development of a Software for Predicting Propulsion Performance of Ships in Waves

预测船舶波浪推进性能软件的开发

• 批准号: 11555259
• 负责人: IWASHITA Hidetsugu
• 金额: $ 5.5万
• 依托单位: HIROSHIMA UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11555259/
• 关键词: Propulsion Performance; Ship Seakeeping; Rankine panel method; Side wall effect of a towing tank; Unsteady wave; ランキンパネル法; ハイプリッド法; 非線形定常流場; 非定常流場; 波浪中推進性能

This study aimed to develop a software to predict propulsion performance of ships in waves. The Rankine panel method, which has been used for predicting propulsion performance in carm water, extended to the unsteady problem of ships in waves taking into account of the steady wave field. The following researches were carried out in the first two years : (1) Development of the Rankine panel method for the steady problem, which can solve the fully nonlinear steady free-surface problem, (2) Development of the Rankine panel method for the unsteady problem, which can take into account of the fully nonlinear steady wave field into the unsteady problem, (3) Computations for slender and blunt ships and comparison of numerical results with experiments which were also carried out through this study, (4) Extension of the method to be applicable to the low frequency range. In the final year we made clear the side wall effects of a towing tank by a simple numerical simulation and validated the unsteady wave patterns experimentally obtained in (4). Additionally we rearranged plenty of experimental data as a data-base which can be utilized by another researchers, and the interface of the software is made replete for the convenience of another users.

本研究旨在开发一套波浪中船舶推进性能预测软件。本文将常用于船舶推进性能计算的朗肯面元法推广到船舶在波浪中的非定常问题。在头两年进行了以下研究：（1）发展了定常问题的Rankine面元法，该方法可以求解完全非线性的定常自由面问题;（2）发展了非定常问题的Rankine面元法，该方法可以将完全非线性的定常波场考虑到非定常问题中，（3）对细长和钝头船的计算以及数值计算结果与试验结果的比较。（4）将方法推广到低频范围。最后一年，我们通过简单的数值模拟明确了拖曳水池的侧壁效应，并验证了（4）中实验获得的非定常波型。此外，我们还重新整理了大量的实验数据，作为数据库，以供其他研究人员使用，并使该软件的界面，以方便其他用户。

项目成果

Nechita, M.: "A Bluntness Effect of Hull Form on Hydrodynamic Forces and Unsteady Waves of a Ship Advancing in Waves"Transactions of the West-Japan Society of Naval Architects. 102. 11-19 (2001)

Nechita, M.：“船体形状对波浪中前进的船舶的水动力和不稳定波浪的钝性影响”西日本造船学会会刊。

Iwashita, H.: "On Unsteady Waves Generated by a Blunt Ship with Forward Speed in Waves"Proc. Of 15th International Workshop on Water Wales and Floating Bodies, Caesarea. 87-90 (2000)

Iwashita, H.：“论由波浪中前进速度的钝船产生的不稳定波浪”Proc。

Nechita,M.: "Influence of the Fully Nonlinear Steady Wave Field on the Unsteady Wave Field of a Blunt Ship Advancing in Waves"西部造船会々報. 101(印刷中). (2001)

Nechita, M.：“完全非线性稳态波场对波浪中前进的钝船的非稳态波场的影响”《西方造船公报》101（印刷中）。

Iwashita, H.: "On Unsteady Waves Generated by a Blunt Ship with Forward Speed in Waves"Proc.of 15^<th> International Workshop on Water Waves and Floating Bodies. 87-90 (2000)

Iwashita, H.：“关于波浪中向前速度的钝船产生的不稳定波浪”第 15 届国际水波和浮体研讨会论文集。

片岡史朗: "時間領域Green関数法による波浪中船体運動の計算"西部造船会々報. 101. 49-61 (2000)

Shiro Kataoka：“使用时域格林函数方法计算波浪中的船体运动”西方造船工程师协会公告 101. 49-61 (2000)。