摘要
基于CFD的RANS方法,计入粘性和自由面的影响,模拟船舶剖面柱体的单自由度强迫摇荡运动,得到横荡、升沉、横摇及横荡对横摇的附加质量与阻尼系数,并与试验进行了比较,符合良好。两种不同网格进行试算比较表明:整体域移动网格的稳定性和计算效率要优于局部重划的非结构网格。最后,针对加装了舭龙骨的柱体进行强迫横摇运动模拟,求解大幅度横摇下的横摇阻尼,分析了舭龙骨尺度对横摇阻尼的影响。各种计算表明:无论是线性还是大幅度非线性运动,粘性CFD方法能有效地预报耐波性中各种运动模态的的水动力系数。
Based on CFD RANS method,this paper simulates the single-degree-of-freedom forced motion of a ship section and computes added mass and damping coefficient of sway,heave,rolling and sway to roll mode.The numerical results are in agreement with the measured value of model tests.Comparisons between two types of gird indicate that the entire domain move gird is superior to the local re-meshed unstructural gird referring the stability and efficiency of the calculation.As for nonlinear large amplitude roll motion,numerical results of forced roll motion are obtained to analyze the influence of the different sized bilge keels on the roll damping.It is concluded that CFD method can simulate both linear and nonlinear large amplitude forced motion and can compute hydrodynamic coefficients of seakeeping effectively.
出处
《水动力学研究与进展（A辑）》
CSCD
北大核心
2011年第4期509-515,共7页
Chinese Journal of Hydrodynamics
基金
高等学校学科创新引智计划(B08031)资助
