domain reduction method

- April 4, 2023 at 5:39 pm
  
  Maryam Tabbakhh
  Subscriber
  
  Hi All. I am trying to implement DRM boundary like Bielak proposed to simulate the behavior of soil. Like the figure below. The forces need to apply to the interior and exterior nodes of the DRM layer. I was wondering how can I do that in LSDYNA? Should I transfer displacement there and it will take care of calculating the forces at that layer or I need to appy both acceleration and displacement there?
  
  Thanks for the info
  Three-dimensional nonlinear soil–structure interactionfor Rayleigh wave incidence in layered soils, Nguyen et all.
- April 15, 2023 at 7:12 am
  
  Ushnish Basu
  Ansys Employee
  
  More detailed answer is here: https://forum.ansys.com/forums/topic/drm-approach-in-soil-structure-interaction/
  You can use INTERFACE_SSI__AUX to record free-field motions and forces in a free-field model, and then apply them to the soil-structure model using LOAD_SEISMIC_SSI_AUX

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