Hi Pourya,

In Abaqus, infinite elements cannot be directly combined with Eulerian (CEL) elements. However, there are alternative approaches you can use to simulate wave propagation and absorption at the boundaries of your soil domain in a CEL model.

One such approach is to implement a non-reflecting boundary condition using a user subroutine. The following steps outline a possible procedure:

• To implement this, you'll need to write a user-defined subroutine in Abaqus using FORTRAN. The subroutine should be designed to calculate the appropriate boundary conditions at the edges of your soil domain to minimize wave reflections.

• Set up your CEL model in Abaqus/CAE as usual.
• Ensure that the boundaries of the soil domain where you want to minimize wave reflection are properly meshed and defined.

• In the Abaqus input file, use the *USER DEFINED FIELD option to call the user subroutine you have written. This will apply the non-reflecting boundary condition at the specified soil domain boundaries.

• Execute the analysis in Abaqus, making sure to specify the appropriate user subroutine with the 'user' keyword.

It's important to note that writing and implementing user subroutines in Abaqus may require some experience with FORTRAN programming and a solid understanding of the problem at hand. If you're not familiar with this, you may want to seek the help of someone with experience in writing Abaqus subroutines.

Additionally, keep in mind that this approach may not be as efficient as using infinite elements, but it should provide a reasonable approximation of wave absorption at the boundaries of your Eulerian soil domain.

I hope this helps!

Best regards,

Alessandro