港池长周期波浪振荡试验研究

Experimental study of long-period wave oscillation in harbor

港池长周期波浪振荡对港内泊稳条件极为不利,严重危害港内船舶的正常停靠与作业。通过物理模型试验,对某港内长周期波浪振荡和放大情况进行研究。结果表明,在短周期波浪作用下,港内发生了明显的长波振荡,5.47 m波高作用下港池长周期波浪波高可达0.4 m,在633、320和200 s附近的长波谱图均有明显峰值。通过港内外波浪能量对比发现,0.008 Hz以下频率港外波浪能量远不及港内波浪,港域内部在320和200 s附近的长波能量最大被放大5倍。研究结果可为类似工程长周期波浪防治提供参考。

Long-period wave oscillation leads to extremely terrible wave conditions in the harbor,which seriously jeopardizes the normal docking and operation of ships in the port.The oscillations and amplifications of long-period waves in a harbor are studied by physical model tests.The results show that long-period oscillations obviously occur in the harbor basin under short waves,and the long-period wave height reaches to 0.4 m under 5.47 m incident wave height.Wave energy in the port is amplified in the port at the wave period nearly equivalent to 633,320 and 200 s.Through the comparison of wave energy inside and outside the harbor,it is found that the wave energy outside the harbor at a frequency below 0.008 Hz is far less than the wave inside the harbor,and the long-wave energy inside the harbor area near 320 s and 200 s is amplified by 5 times.The results can be beneficial for the prevention of long-period waves in similar projects.