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本文用谱分析方法计算了不规则波作用下圆柱墩群上的波浪力,给出了理论的群墩影响系数,文中对二个墩、三个墩,四个墩的情况分别用P-M谱与Bretshneider谱作了计算,并与规则波结果进行了比较,得到了一些有意义的结果。不规则方法得到的群墩影响系数随着墩间距的增加很快地就接近于弧立墩的情况。一般说来,当墩间距与墩径的比值大于4时,就可以不考虑群墩的相互影响。
In this paper, the wave forces on the circular cylinder group under the action of irregular waves are calculated by the spectral analysis method, and the theoretical influence coefficient of the group pier is given. In this paper, the case of two piers, three piers and four piers are respectively calculated by PM spectrum and The Bretshneider spectrum is calculated and compared with the results of the regular wave, and some meaningful results are obtained. The influence coefficient of the group pier obtained by the irregular method is close to the situation of the arched pier rapidly with the increase of the pier spacing. In general, when the ratio of pier spacing to pier diameter is greater than 4, the interaction of piers can be disregarded.