复杂水流环境下系泊船的水动力特性研究

Study on hydrodynamic forces of mooring ship in complex flow environment

摘要:

为研究深水码头复杂水流条件下系泊船的水动力特性，利用CFD软件STAR-CCM+对系泊船模型的粘性流场进行瞬态数值模拟，通过求解 RANS方程和Realizable k-ε湍流模型获得船舶水流作用力。在无波浪定常流作用下，系泊船姿态最终保持稳定，可用固定船舶近似代替系泊船进行模型简化。在完成网格无关性和数值模型合理性研究的基础上，对不同流速、不同流向角度以及流向沿水深变化的复杂水流条件下船舶的水动力进行预报，探讨不同水流条件下系泊船纵向力、横向力、艏摇力矩的变化规律，研究成果可为复杂水流环境下系泊船的布缆及相关工程设计提供参考。

Abstract:

In order to study the hydrodynamic characteristics of moored ship under complex flow conditions of deep-water wharf, the transient numerical simulation of viscous flow field of moored ship model was carried out with STAR-CCM +. The flow force was obtained by solving RANS equation and realizable k - ε turbulence model. Under the action of steady flow without wave, the attitude of the moored ship remains stable at last, so the model can be simplified by using the fixed ship instead of the moored ship. Based on the research of grid independence and rationality of numerical model, the hydrodynamic forces of ships under different flow velocity, different flow direction angle and the flow direction changing along the water depth are predicted, and the change rules of longitudinal force, transverse force and yaw moment of moored ships under different flow conditions are discussed. The research results can provide a reference for the mooring ship's cable layout and related engineering design in complex flow environment.