利用大涡模拟技术，对某双体船模型及实船进行湍流脉动压力的数值模拟，并将计算结果作为输入，采用声学有限元法对双体船实船水动力噪声进行了预报。数值模拟结果表明计算与试验数据吻合良好，能够有效地模拟双体船航行时船体周围的湍流脉动压力分布。此外，以湍流脉动压力为输入，通过声学有限元法得到的双体船水下辐射噪声在高频段与以往的统计能量法趋于一致，而在低频段的结果高于统计能量法，可以更加合理地预报双体船的水动力噪声。
By using large eddy simulation (LES), numerical computations of turbulent pressure fluctuations on a catamaran have been carried out both on scale model and full scale ship. Based on the result, a prediction of hydrodynamic noise radiating from catamarans has been executed by using acoustic FEM method. The simulation result matched well with the experiment, thus showed the effectiveness of LES method in simulating the distribution of turbulent pressure. Besides, based on the input of the turbulent pressure fluctuations, the radiation noise acquired by acoustic FEM method corresponded with the result of traditional SEA method in high-frequency stage, while in low-frequency stage, the result is higher than that of SEA method, which can be more reasonable to predict hydrodynamic noise of catamarans.
2020,42(8): 38-42 收稿日期：2019-11-05
DOI：10.3404/j.issn.1672-7649.2020.08.007
分类号：U661.43
作者简介：龚丞(1987-),男,硕士,高级工程师,从事船舶总体设计和研究
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