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波浪引起的二阶平均波浪力附加阻力是自升式平台湿拖过程中总阻力的重要组成部分。基于三维势流理论分析了影响自升式平台湿拖过程中附加阻力的相关参数,包括Jonswap谱γ值、航速以及波浪要素等,进行了敏感性分析。研究结果表明:计算二阶波浪力增阻所选取的Jonswap谱γ值取3.5更为合理;二阶力增阻对波浪周期的变化较为敏感,实际拖航阻力估算只需考虑静水拖航阻力和实际海况的双重作用,可略去航速的影响;并验证了二阶波浪力增阻值与有义波高的平方成正比,提供了一种可靠的二阶力增阻估算方法。
Second-order mean wave force caused by waves The additional resistance is an important part of the total drag in the wet drag process of a self-elevating platform. Based on the three-dimensional potential flow theory, the relevant parameters that affect the additional drag in the self-elevating platform during wet drag are analyzed, including the Jonswap spectrum γ, speed and wave elements, and the sensitivity analysis is carried out. The results show that it is more reasonable to choose the γ value of Jonswap spectrum of 3.5 for the second-order wave drag reduction. The second-order drag increase is more sensitive to the change of the wave period. The actual tow drag estimation only needs to consider the hydrostatic drag drag and The dual effect of the actual sea state can neglect the influence of speed. The second-order wave force resistance value is proportional to the square of the rounder wave height, and a reliable second-order force-dragging estimation method is provided.