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Workflow 2: eScript - Surface Wave from inland source across hard rock into Basin.

As waves travel through different structures, with different material properties, there are multiple interference effects, some of which can simply spell 'catastrophic damage' for things at a certain point.

We will use eScript to simulate a wave-front entering our model, travelling through it, and measure key parameters at our targets, such as max acceleration, and acceleration over time as the wave(s) pass through.

The max acceleration results will be made available as a 'risk map' - which can be georeferenced. with the acceleration over time data being made available for other simulation tools.

Assumptions

  • The incoming wave can be described as a plane wave front when it enters out model space (source is sufficient distance away)
  • Models have been altered from original purposes - absorption layer added at base (simplify the computation)

Inputs and Data.

Incoming Wave descriptors
  • polarisation
  • travel direction
  • frequency
  • wave length
  • amplitude
Physical parameters from the geological model:
  • p-wave Velocity
  • s-wave Velocity
  • density
Alternatively:
  • Young's modulus
  • Poisson's ratio
  • density
A Model
  • Voxset model representative of the Perth basin spanning from the coast, extending just beyond the darling scarp into the Yilgarn.

A Fake Example

fake-model.jpg

An incoming wavefront [3] propogating through a shelf, towards a fault [2], into a sedimentary basin system, ultimately having an impact at a site [1].

Simulation

A high order scheme is required for getting 'more meaningful' results for this kind of wave propagation - this is in development by the eScript team.

Results

  • an animation of a Tracer output of the wave passing through target.
  • a xyz graph (json format?) for us to view the wave over time back in the portal.
  • any other useful outputs?

-- TerryRankine - 23 Jul 2014
Topic revision: r2 - 01 Sep 2014, TerryRankine
 

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