随机波对水平板冲击作用实验研究

Experimental study of random wave impact on a horizontal plate

波浪对透空式海上建筑物的冲击作用已经成为此类建筑物安全的重要影响因素。进行了单向随机波对水平板冲击作用水槽实验研究。总共进行了4个方向（0°、15°3、0°、45°）,相对入射波波高H1/3/d=0.093 75-0.25,周期Tp=1.0-2.0 s,水平板距离静水面的高度s与入射波高H1/3的比值s/H1/3=0.0-0.5的实验研究。采用小波分析方法去除了由于测压传感器振荡引起的测量数据的振荡和漂移,在此基础上统计分析给出了不同方向水平板下的压力峰值分布情况。采用无因次方法,讨论了无因次冲击力与相对入射波高H1/3/d、相对板宽B/L、相对净空s/H1/3及波向角β的关系。

This paper presents the results of experimental research on random wave impact on a horizontal plate.The test wave is unidirectional and irregular.The experiments are carried out with perpendicular random waves（β=0°） and oblique random waves（β=15°,30°,45°）,the relative significant wave heights H1/3/d ranging from 0.09375 to 0.25,the peak wave periods Tp ranging from 1.0 s to 2.0 s with 0.2 s increment,and the clearance of the model with respect to the significant wave height s/H1/3 ranging from 0.0 to 0.5 with 0.1 increment.Wave impact pressures are obtained by using wavelet analysis to remove noise signals from the dynamic responses of the instruments.The distribution characteristic is given for the impact pressures of the perpendicular and oblique waves along the underside of the plate.The influence of different incident wave parameters including the relative water height H1/3/d,the relative plate width B/L and the relative clearance s/H1/3 on the non-dimensional wave impact forces is discussed.