直立码头前船波浪力耦合计算模型

建立了外域用Boussinesq方程、内域用刚体运动方程的直立码头前二维船剖面波浪力的时 域计算耦合模型，内域与外域在交界面的匹配条件是流量连续和压力相等. 进行了相关模型 实验，并把计算结果与实验结果进行了对比. 推导了船体与水底和直立码头之间间隙内流体 运动的自振频率，研究了间隙内流体运动的共振现象.

STUDY ON NONLINEAR WAVE MOTIONS AND WAVE FORCES ON SHIP SECTIONS AGAINST VERTICAL QUAY IN A HARBOR

A two-dlmensional time-domain coupled numerical model is developed to calculate the nonlinear wave forces acting on a ship section against vertical quay in a harbor.The fluid domain is divided into an inner domain and an outer domain.The outer domain is the area between the left side of the ship section and the incident boundary,where the flow can be expressed by Boussinesq equations.The rest area is the inner domain, which is the domain beneath the ship section plus the domain between the right side of the ship section and the vertical quay wall.The flow in the inner domain can be expressed by Newton's Second Law.Matching conditions on the interface between the inner domain and the outer domain are the continuation of volume flux and the equality of pressures.The numerical results of the coupled model agree well with the experimental data for wave elevations and wave forces.The natural frequency of the fluid motions in the gap between a ship section,seabed and vertical quay wall is derived.It is shown from the experimental data and numerical results that the resonance waves in the gap are induced by the first or higher harmonics of incident waves,and the first or higher order horizontal wave forces on the ship section against vertical quay wall increase greatly when the frequency of the harmonics of incident waves is close to the natural frequency of fluid motions in the gap.