Plaxis B.V.

2D Dynamics Module



The 2D Dynamics module is an extension to PLAXIS 2D. Geotechnical applications require advanced constitutive models for the simulation of the non linear, time dependent and anisotropic behaviour of soils and/or rock. Although the modelling of the soil itself is an important issue, many projects involve the modelling of structures and the interaction between the structures and the soil. 2D Dynamics offers the tools to analyse the propagation of waves through the soil and their influence on structures. This allows for the analysis of seismic loading as well as vibrations due to construction activities. 2D Dynamics offers the possibility to perform dynamic calculations in individual calculation phases.

  • Upon Request: Free Field & Compliant Base Boundaries (VIP)
  • Possibilities of showing minima and maxima over dynamic phases as a whole


  • Time-dependent dynamic load systems for point loads, distributed loads and prescribed displacements (velocities, acceleration)
  • Independent application of horizontal and vertical displacement (velocity, acceleration) components
  • Absorbent (viscous) boundaries to absorb waves at the model boundaries
  • Rayleigh damping (aR and ßR) per material data set for soil layers and structures)
  • Smooth meshes, to prevent numerical oscillations and internal reflections
  • HSsmall model including small-strain stiffness, modulus reduction and hysteretic damping
  • Upon request: UBCSAND liquefaction model (available as User-Defined Soil Model) (VIP)

  • Automatic time stepping using dynamic sub-steps
  • Selection of Newmark time integration scheme (aN and ßN)
  • Free vibration analysis
  • Harmonic loads
  • Import of SMC files for time-dependent dynamic loading

  • Velocities and acceleration in addition to displacements
  • Envelopes of structural forces and displacements
  • Time-displacement, Time-velocity, Time-acceleration curves
  • Switch from time-curves to frequency-curves using Fast Fourier Transform
  • Pseudo Spectral Acceleration response spectrum
  • Animations (creation of AVI files)

  • Single source vibrations
  • Earthquake simulation
  • Dynamic soil-structure interaction
  • Evaluation of natural frequencies and resonance
  • Embankment stability under dynamic loading
  • Machine and traffic vibrations
  • Impact loading
  • Structural response under earthquake loading
  • Racking of tunnel lining

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