应力波在承台-桩系统中传播数值分析

通过应力波在承台-桩系统中传播有限元计算,分析了承台-桩几何尺寸、承台-桩材料特性对应力波传播图案及能量的影响,同时还讨论了激振频率、激振区域、接收点位置以及邻桩桩体反射波对测点信号影响。计算表明承台的几何尺寸对应力波在承台-桩传播影响很大。边界的反射波不再是单一的波,而是很复杂的波列,它不仅会影响承台表面测点的响应,而且还会在承台-桩交界面形成新的入射、反射,使得测点的桩身反射波形识别很困难。

Numerical analysis of wave propagation in platform-pile system

Effects of the geometric sizes and the material properties of plateform pile system on the wave patterns and energy are analyzed through the finite element calculation of wave propagation in platform pile system. Effects of the vibration frequencies,the loading area, the receiver locations and the neighboring piles on wave propagation are also discussed. The results show that the geometric sizes of platform have great influences on wave propagation.Because the different type of waves with different incident angles are reflected from the boundaries,the patterns of reflected waves are complex.The reflections from the boundaries not only influence the response of a platform surface, but also form a new incidence into and reflection from the boundary between a pile and a platform. It is very difficult to distinguish the waves reflected from the pile under the influences of boundary reflection.