垂直穿出水面圆柱体受到的非线性波浪载荷、波流载荷以及爬升与砰击现象试验研究

Experimental Investigations of Nonlinear Wave,Wave-current Loads, Runup and Slamming on Vertical Surface-Piercing Columns

本文对陡波中两个垂直圆柱体与波浪之间的干涉现象做了研究。研究的关注点在于非线性的波浪力、波流力以及陡波的绕射和立柱周围的波浪运动,目的在于分析非线性载荷、立柱上的爬升和砰击产生的机理。试验中采用了6cm和10 cm直径的两种尺度的圆柱。在试验中,PIV设备用来捕获波浪域运动情况。研究的目标包括(1)分析波陡对立柱受到的波浪力的影响;(2)通过比较波浪载荷和波流载荷分析流对非线性载荷的影响;(3)观察波浪域运动以及波浪爬升和砰击现象。

Interactions between steep waves and two vertical surface-piercing cylinders are investigated experimentally.The focus of this study is on nonlinear wave and wave-current forces,the scattering of steep waves,as well as wave kinematics around the circumference of cylinders,with an aim to investigate the mechanisms of higher harmonic loads,runup and slamming due to steep waves.Two cylinder diameters,6 cm and 10 cm,were adopted in the model set-up.PIV was utilized to measure kinematics of flow field in this experiment.The specific objectives of this study are to(1)analyze the impact of wave steepness on wave forces on columns;(2)investigate current’s effect on nonlinear wave loads by comparing the wave only and wave-current forces on the column;(3)observe the kinematics of steep wave,runup and slamming.