单体复合船型纵向运动幅频响应函数计算的两种粘性修正方法

对单体复合船型纵向运动幅频响应函数计算的两种修正方法进行了比较。分别采用横向流理论方法和RANS方程数值计算方法,计算了单体复合船型的水动力修正系数,应用STF法对舰船的纵向运动进行了预报,并将预报结果和模型试验值进行了比较分析。结果表明,两种方法都能在一定程度上反映组合附体的减摇效果,可用于单体复合船型的运动预报。其中,基于RANS方程数值计算方法预报精度较高,具有良好的工程应用价值。

Two Correction Methods for Calculating Longitudinal Motion Amplitude-Frequency Response Function of Hybrid Monohull

A comparison between two correction methods for calculating longitudinal motion amplitude-frequency response functions of the hybrid monohull is carried out in this paper.Corrected hydrodynamic coefficients of the hybrid monohull are calculated based on lateral flow theory and RANS equations respectively,and then the longitudinal motion of the hybrid monohull sailing in waves is predicted with STF method.The predicted result is compared with the model test result.The comparison shows that,both of two correction methods can reflect the effect of built-up appendage and can be used for predicting the longitudinal motion of hybrid monohull.The accuracy of the latter is obviously better than the former;it has good value in engineering application.