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应用CFD软件对船舶通过桥区时的船体-桥墩水动力相互作用进行数值研究,通过使用动网格技术及UDF进行船舶运动过程中的网格更新,对船舶沿直线航线匀速驶经桥墩时的非定常粘性流场进行数值模拟,对桥墩诱导的船体非定常水动力进行数值预报,其中假设船舶航速很小,因而自由面兴波的影响可以忽略。以一艘集装箱船和一个垂直柱体桥墩模型为例,选取不同的船体-桥墩横向距离进行了数值计算,得到了作用在船体上的横向力和转首力矩时历曲线,分析了船体-桥墩横向距离对船体非定常水动力的影响。
The CFD software is used to study the hydrodynamic interaction of hull-pier when the ship passes the bridge area. By using the dynamic grid technology and the UDF to update the grid during the course of the ship movement, The unsteady viscous flow field is numerically simulated to predict the unsteady hydrodynamics of the hull induced by piers. It is assumed that the speed of the ship is very small and the influence of free-surface waves can be neglected. Taking a container ship and a vertical column pier model as an example, the lateral hull-pier transverse distances were selected for numerical calculation. The transverse force and the first moment moment history curve acting on the hull were obtained. The hull-pier Influence of Transverse Distance on Unsteady Hydrodynamics of Hull.