Using PLAXIS, it is possible to simulate soil-structure interaction. Here the influence of a vibrating source on its surrounding soil is studied. Due to the three dimensional nature of the problem, an axisymmetric model is used. The physical damping due to the viscous effects is taken into consideration via the Rayleigh damping. Also, due to axisymmetry 'geometric damping' can be significant in attenuating the vibration. The modelling of the boundaries is one of the key points. In order to avoid spurious wave reflections at the model boundaries (which do not exist in reality), special conditions have to be applied in order to absorb waves reaching the boundaries.
This exercise requires the Dynamics module.
PLAXIS 2D Tutorial 12: Potato field moisture content
PLAXIS 2D Tutorial 14: Pile driving
PLAXIS 2D Tutorial 15: Free vibration and earthquake analysis of a building
PLAXIS 3D Tutorial 08: Dynamic analysis of a generator on an elastic foundation