IMO组织对于船舶最小功率要求提出了严苛要求，为求得船舶最小功率要求需要计算船舶在极端海况下受到的总阻力，其中波浪增阻的计算最为困难。目前广泛采用的CFD方法在计算VLCC这类超大型船舶的波浪增阻时效率较低。为快速准确计算这类船舶的波浪增阻，本文以32万吨VLCC为例，利用水动力计算软件Aqwa分别计算出其在静水及波浪环境下受到的阻力，通过两者相减得到波浪增阻。与模型试验结果相比较发现，采用三维势流理论预报波浪增阻计算效率高且结果准确，可作为此类船舶开发前期的波浪增阻预报参考。但在单独计算静水及波浪中阻力时误差较大，不建议采取这一方法。本文验证了这一方法在低Frude数时的准确性，高Frude数时这一方法是否有效还需进一步验证。
IMO puts forward strict requirements for minimum propulsion of ships. In order to obtain minimum power required by standard, it is necessary to calculate the total resistance of ships under extreme sea conditions, among which the calculation of wave added thrust is the most difficult. At present, the CFD method is widely used in calculating wave added thrust of ships, however when it comes to large ships like VLCC the method is not applicable. In order to calculate wave added thrust of VLCC quickly and accurately, this paper takes a 320 000 ton VLCC as an example, calculates the resistance of VLCC under static water and wave environment by software Aqwa, subtracting the former by the latter. Compared with the model test results, it is found that the three-dimensional potential flow theory is efficient and accurate in predicting wave added thrust, which can be used as a reference for the prediction of wave added thrust in the early stage of development of such ships. However, it is not recommended to adopt this method because of the large error in the calculation of resistance in still water and waves. This paper only verifies the accuracy of this method at low Frude number, and whether this method is effective at high Frude number needs further verification.
2020,42(8): 88-92 收稿日期：2019-12-09
DOI：10.3404/j.issn.1672-7649.2020.08.016
分类号：U662.2
作者简介：吴思莹,(1991-),女,硕士研究生,主要从事船舶总体设计方面的研究
参考文献：
[1] International organization for standardization. Ship and marine technology — guidelines for the assessment of speed and power performance by analysis of speed trial data[S]. 2015.
[2] MEPC. 232 (65), 2013. Interim guidelines for determining minimum propulsion power to maintain the manoeuvrability of ship in adverse conditions[S].
[3] 魏锦芳, 陈京普, 王杉, 等. 船舶全浪向波浪增阻数值计算与模型试验验证[J]. 中国造船, 2017, 58(4): 24-30
[4] 于海, 封培元, 熊小青, 等. 中型豪华游船波浪增阻数值模拟分析[J]. 船舶, 2019, 30(1): 99-104
[5] 李纳, 谌志新. 50 m围网渔船波浪增阻数值模拟[J]. 船舶工程, 2019, 41(4): 7-12
[6] 尹崇宏, 吴建威, 万德成. 基于IDDES方法的模型尺度和实尺度VLCC阻力预报与流场分析[J]. A辑, 2016, 31(3): 259-268
[7] HU Jinpeng, ZHU Ling, LIU Shihui. Analysis and optimization on the flow ability of wave buoy based on AQWA[J]. IOP Conference Series: Earth and Environmental Science, 2018, 171(1)
[8] FALTINSEN. O. M. 船舶与海洋工程环境荷载[M]. 上海: 上海交通大学出版社, 2008: 8-9.
[9] 吴思莹. LNG-FSRU船舶在波浪中的运动与液舱内流体晃荡的耦合数值分析[D]. 镇江: 江苏科技大学, 2016.
