高雷诺数时弹性圆柱的波流载荷

HYDRODYNAMIC FORCES ACTING ON AN ELASTIC CIRCULAR CYLINDERIN COMBINED WAVE AND CURRENT FLOW AT HIGH REYNOLDS NUMBERS

摘要

摘要:在０．６１×１０￣５Ｒｅ６．０１×１０￣５，０．９３Ｈ／Ｄ２．５０（Ｈ为波高，Ｄ为圆柱直径）的范围内实验研究了弹性圆柱在浪流联合作用下的流体载荷。通过测量柱表面压力，得到了脉动升力和阻力系数，并给出了Ｍｏｒｉｓｏｎ公式中的Ｃ＿Ｄ，Ｃ＿Ｍ值随Ｋｃ数的变化关系，实验结果表明：在浪流联合作用下的圆柱体，其流体载荷与雷诺数的变化密切相关，并且圆柱的振动对流体载荷也有影响。

Abstract:In this paper, wave forces acting on a submerged circular cylinder movingforward with a constant velocity in regular waves are investigated experimentally. TheReynolds numbers and the Keulegan──Carpenter numbers are in the range: 0.61 × 10￣5Re6.01 × 10￣5,4.61 Kc74.80,The surface pressures of the cylinder and the cylinder’svibrations caused by the hydrodynamic forces are measured,from which the drag and inertiacoefficients(C_D, C_M)in Morison’s formular are analyized, the fiuctuating drag and liftcoefficien...