海洋拖曳系统是一种经典的流固耦合系统。然而，拖曳系统通常是根据实验数据确定的恒定阻力系数进行动态模拟。为了改进这种选取固定的经验阻力系数模拟方法，本文将莫里森方程应用于节点位置有限元，将改进的节点位置有限元法（NPFEM）与雷诺数平均N-S（RANS）方法相结合，用于预测雷诺数范围内沿缆索的水动力，通过计算获得的水动力，对NPFEM进行流体动力学插值。结果表明，该方法得到的模拟结果与实验的结果更加吻合，更好地模拟拖缆的真实运动情况。该FSI方法揭示了拖曳系统周围真实的强流体动力学确定的缆索动力学和涡流结构引起的振动。
Ocean towing system is a classic fluid-structure coupling system. However, towing systems are typically dynamically simulated based on constant drag coefficients determined from experimental data. To improve the method of selecting a fixed empirical drag coefficient for simulation, this paper applies the Morrison equation to the nodal position finite element method. The improved nodal position finite element method (NPFEM) is combined with the Reynolds number averaged N-S (RANS) method to predict the hydrodynamic forces along the cable within the Reynolds number range. By calculating the obtained hydrodynamic forces, the NPFEM is interpolated for fluid dynamics. The results indicate that the simulation results obtained by this method are more consistent with the experimental results, and better simulate the real motion of the towing cable. This FSI method reveals the vibration caused by the cable dynamics and vortex structures determined by the real strong fluid dynamics around the towing system.
2024,46(23): 57-63 收稿日期：2024-3-4
DOI：10.3404/j.issn.1672-7649.2024.23.009
分类号：P756.1
基金项目：国家自然科学基金项目（51709133）
作者简介：黄帅瑜(2000-),男,硕士研究生,研究方向为拖曳系统流固耦合
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