Big Model, small object of focus

Hello all.

I am producing a model upto 100m to 350m deep, with a 2.5m long pile / anchor polygon buried between 5m and 300m depth.

In producing the mesh, even when very fine, the mesh generated is around 30cm between the nodes.

Is there any way to improve the frequency of the nodes along the length of the 2.5m anchor?

Thanks for your help!

Parents
  • Dear Stephen,

    The global settings (Medium, Fine, etc.) can assist but it is highly dependent on the model dimensions, as explained in our Reference manual.

    Apart from the global coarseness, there are local refinement options (coarseness factor) to be considered when it comes to all PLAXIS objects. See below:



    This can be applied to points, lines, surfaces and volumes. For more information please check our Reference manual.

    If those still do not give the expected results, then you can consider using partitioning in your geometry. That means that you can introduce a box of surfaces surrounding the object you want to refine so that it is partitioned from the rest of the geometry. Then, you can apply local refinements to this area that will make it easier for the mesher to generate smaller elements when coming from the global settings.

    Below you can see the box (I have hidden some of the side surfaces for visualisation purposes) around a tunnel joint:

Reply
  • Dear Stephen,

    The global settings (Medium, Fine, etc.) can assist but it is highly dependent on the model dimensions, as explained in our Reference manual.

    Apart from the global coarseness, there are local refinement options (coarseness factor) to be considered when it comes to all PLAXIS objects. See below:



    This can be applied to points, lines, surfaces and volumes. For more information please check our Reference manual.

    If those still do not give the expected results, then you can consider using partitioning in your geometry. That means that you can introduce a box of surfaces surrounding the object you want to refine so that it is partitioned from the rest of the geometry. Then, you can apply local refinements to this area that will make it easier for the mesher to generate smaller elements when coming from the global settings.

    Below you can see the box (I have hidden some of the side surfaces for visualisation purposes) around a tunnel joint:

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