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讨论了水中高承台桩的弯曲振动特性,引入附加质量的概念,假定一部分水体附着在桩上和桩一起振动,增加了桩的质量,而不改变桩的抗弯刚度,使得桩分为密度不同的两段,根据达朗贝原理分别列出桩的弯曲振动方程,得出方程组,利用桩的连续性和边界约束条件求解方程组,得到一个计算频率的公式,并对计算桩长的选取进行了分析。通过对比东海大桥风力发电场风机基础中一根桩和青岛海湾大桥两根桩的实际检测数据与计算值,证明了此公式运算简单,精度较高,可以为工程上采用。
The bending vibration characteristics of high capped piles in water are discussed, and the concept of additional mass is introduced. Supposing a part of water adheres to the piles and vibrates together with the piles to increase the quality of the piles without changing the flexural rigidity of the piles, so that the piles are divided into different densities According to the principle of Darlaibe, the bending vibration equations of the pile are listed separately, and the equations are obtained. The equations are solved by using the continuity of the pile and the boundary constraints, and a formula for calculating the frequency is obtained. Analysis. By comparing the actual test data and calculated values of one pile in the foundation of wind farm of Donghai Bridge and two piles of Qingdao Bay Bridge, it is proved that this formula is simple in operation and high in precision and can be adopted in engineering.