【摘要】 <正> 一、问题的提出从对海上建筑物的施工实践中,人们早已注意到下面的事实,即堤前波动对堤面的影响是不可忽视的。例如,当设计防波堤时必须考虑由堤前的波动而导致的水面升高,不然的话,就会造成人民生命财产不可想象的重大损失或者在建筑时人力、物力的巨大浪费。那么上述堤前波动的这种自然现象与堤前入射波的关系又是怎样呢?人们以往又是如何讨论的呢?更多还原

【Abstract】 Incident wave recordings and waves recorded on the vertical wall are obtained simultaneously, and trends are removed out of the data. The relation between the two was analyzed in the paper. The results show that there are peaks in spectra of the both in a range of 0.095Hz—0.114Hz. Peaks of （?）_xy（f）, the frequency correlation function, and （?）_xy（f）, the phase correlation function, are found at the same peak frequencies as above, by means of cross-spectrum estimation. An explanation of the results is that those incident components of the peak frequencies, as imput, have a linear relation with the components recorded on the wall, as output after the trends have been removed. The phase function reveals that phase lag between the two is 100°—173° in the peak frequencies. It is pointed out that waves before the wall have larger spectral values at the lower end of whole frequencies.更多还原