声学多普勒流速剖面仪(Acoustic Doppler Current Profiler,ADCP)作为与小型三体科考船浮体尺寸相当的凸出附体,既会影响三体科考船流体动力学,也会因船体兴波导致测量结果存在一定误差。本文基于数值仿真方法,研究各种ADCP安装方案对...声学多普勒流速剖面仪(Acoustic Doppler Current Profiler,ADCP)作为与小型三体科考船浮体尺寸相当的凸出附体,既会影响三体科考船流体动力学,也会因船体兴波导致测量结果存在一定误差。本文基于数值仿真方法,研究各种ADCP安装方案对小型三体科考船流体动力学以及ADCP测量精度的影响,获得了小型三体科考船运动过程中的兴波速度,包括ADCP沿其长度和深度不同位置的影响,并分析得出船体和ADCP周围流动的不利干扰区域。研究结果表明,ADCP沿船体布置位置的不同,对ADCP测量流速的校正量约为5%~10%;结合小型三体科考船阻力以及兴波速度,ADCP的最佳安装和位置为“自由”固定在船体中段、下沉量为0。展开更多
To predict the wave loads of a flexible trimaran in different wave fields,a one-way interaction numerical simulation method is proposed by integrating the fluid solver(Star-CCM+)and structural solver(Abaqus).Differing...To predict the wave loads of a flexible trimaran in different wave fields,a one-way interaction numerical simulation method is proposed by integrating the fluid solver(Star-CCM+)and structural solver(Abaqus).Differing from the existing coupled CFD-FEA method for monohull ships in head waves,the presented method equates the mass and stiffness of the whole ship to the hull shell so that any transverse and longitudinal section stress of the hull in oblique waves can be obtained.Firstly,verification study and sensitivity analysis are carried out by comparing the trimaran motions using different mesh sizes and time step schemes.Discussion on the wave elevation of uni-and bi-directional waves is also carried out.Then a comprehensive analysis on the structural responses of the trimaran in different uni-directional regular wave and bi-directional cross sea conditions is carried out,respectively.Finally,the differences in structural response characteristics of trimaran in different wave fields are studied.The results show that the present method can reduce the computational burden of the two-way fluid-structure interaction simulations.展开更多
文摘声学多普勒流速剖面仪(Acoustic Doppler Current Profiler,ADCP)作为与小型三体科考船浮体尺寸相当的凸出附体,既会影响三体科考船流体动力学,也会因船体兴波导致测量结果存在一定误差。本文基于数值仿真方法,研究各种ADCP安装方案对小型三体科考船流体动力学以及ADCP测量精度的影响,获得了小型三体科考船运动过程中的兴波速度,包括ADCP沿其长度和深度不同位置的影响,并分析得出船体和ADCP周围流动的不利干扰区域。研究结果表明,ADCP沿船体布置位置的不同,对ADCP测量流速的校正量约为5%~10%;结合小型三体科考船阻力以及兴波速度,ADCP的最佳安装和位置为“自由”固定在船体中段、下沉量为0。
基金financially supported by the State Key Laboratory of Structural Analysis,Optimization and CAE Software for Industrial Equipment,Dalian University of Technology(Grant No.GZ23112)the Shandong Provincial Natural Science Foundation,China(Grant No.ZR2021ME146).
文摘To predict the wave loads of a flexible trimaran in different wave fields,a one-way interaction numerical simulation method is proposed by integrating the fluid solver(Star-CCM+)and structural solver(Abaqus).Differing from the existing coupled CFD-FEA method for monohull ships in head waves,the presented method equates the mass and stiffness of the whole ship to the hull shell so that any transverse and longitudinal section stress of the hull in oblique waves can be obtained.Firstly,verification study and sensitivity analysis are carried out by comparing the trimaran motions using different mesh sizes and time step schemes.Discussion on the wave elevation of uni-and bi-directional waves is also carried out.Then a comprehensive analysis on the structural responses of the trimaran in different uni-directional regular wave and bi-directional cross sea conditions is carried out,respectively.Finally,the differences in structural response characteristics of trimaran in different wave fields are studied.The results show that the present method can reduce the computational burden of the two-way fluid-structure interaction simulations.