限制性航道中船行波传播特性的数值研究

Numerical study on propagation characteristics of ship waves in a restricted channel

基于完全非线性Boussinesq方程的开源程序包FUNWAVE-TVD建立了限制性航道中船行波运动的数值模型,重点分析了船舶在该类型航道中诱导生成的最大船首孤立波波高、最大船尾波波高以及最大近岸横向流速的时空分布规律。结果表明:模型能较好地捕捉船行波在限制性航道中的演化过程;根据回归分析得到了最大船首孤立波波高ηmax与船舶吃水p、弗汝德数Fr的幂函数型经验关系;最大船尾波波高ηmax及最大近岸横向流速uymax随船舶吃水p和弗汝德数Fr的不同呈分段式变化规律。研究结果可为限制性内河单线航道的设计以及通航要求提供参考。

Based on the open source package FUNWAVE-TVD in the fully nonlinear Boussinesq equation,a numerical model of ship wave motion in restricted channels was established.The spatial and temporal distribution laws of the maximum bow solitary wave height,the maximum stern wave height and the maximum nearshore lateral velocity induced by ships in this type of channels are emphatically analyzed.The results showed that the model performed better at capturinge the propagation and evolution of ship waves in restricted channels.According to the regression analysis,the power function empirical relationship between the maximum bow solitary wave height ηmax and the ship draft p,Frounde Number Fr was obtained.The maximum stern wave height ηmaxand the maximum nearshore lateral velocity uymax showed a piecewise variation rule with the ship draft p and Froude Numer Fr.The research results can provide reference for the design and navigation requirements of restricted single channels.