一种拖曳系统流固耦合计算方法
A fluid structure interaction method for towed cable system
黄帅瑜 1王志博1
作者信息
- 1. 江苏海洋大学海洋工程学院,江苏连云港 222005
- 折叠
摘要
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.
Abstract
Ocean towing system is a classic fluid-structure coupling system.However,towing systems are typically dy-namically simulated based on constant drag coefficients determined from experimental data.To improve the method of se-lecting 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 aver-aged N-S(RANS)method to predict the hydrodynamic forces along the cable within the Reynolds number range.By calcu-lating the obtained hydrodynamic forces,the NPFEM is interpolated for fluid dynamics.The results indicate that the simula-tion 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.
关键词
拖曳系统/节点位置有限元/雷诺平均方程/边界层分离/流固耦合Key words
towed cable system/nodal position finite element method/reynolds averaged navier stokes equations/boundary layer separation/fluid structure interaction引用本文复制引用
出版年
2024
NETL
NSTL
万方数据