随机波浪作用于三桩桩列上的横向力的水动力特征及群桩效应

The Hydrodynamic Characteristics and pile Grouping Effect of Transverse Forces on an Array of Three-piles in Random Waves

本文试验研究了随机波浪作用于串列及并列三桩桩列上的横向力的水动力特征及组成桩间的群桩效应，给出了横向力系数与ＫＣ、ＬＤ两参数的相关曲线。在频域内建议了一个新参数一横向力比频率，它能从一个方面较好地概括横向力谱的特征。以孤立桩柱的横向力为基准考查了桩间相互干扰产生的横向力变化，并以群桩横向力系数描述了这一变化规律。针对随机波浪的特点，文中给出了计算各组成桩上横向力及合力的实用化方法。

The hydrodynamic characteristics and the pile grouping effect of the transverse forces on three piles in side-by-side arrangement and tandem arrangement are experimentally investigated in random waves and the relations between the transverse coefficients and KC number and 1/D are given in this paper. A new parameter,the frequency ratio of the transverse force is proposed. The parameter can best describe the characteristics of the transverse force spectrum in one respect. Based on the transverse forces on a single pile, the variations of the transverse forces on the piles are investigated and described taking into account the disturbance effect ammong the piles using the transverse coefficients of grouping piles. According to the characteristics of the random waves, practical methods for calculating the transverse forces on each pile andtotal forces on pile group are given.