This post was inspired by CAEAI's blog post on modal analysis sub-modeling and an XANSYS question. Their instructions were not explicit and everything was done in Ansys Classic. The goal here is to show modal submodeling in Ansys Workbench. Here's a walk through of an example:

Solve the coarse model Modal Analysis (System A).

Fig 1: Coarse Model Modal Analysis (System A)

Create a finely meshed submodel Harmonic Response Model (System B). This will be the submodel.

Fig 2: Project Schematic

After creating the desired mesh, add a named selection at the cut boundaries called

cmsel, s, cut_face

nwrite, boundarynodes, node

finish

The above step writes out a file listing the nodes and their coordinates which will be used for interpolation. After solving for the model, Ansys Workbench will flash a lot of e…

**Step 1**Solve the coarse model Modal Analysis (System A).

Fig 1: Coarse Model Modal Analysis (System A)

**Step 2**Create a finely meshed submodel Harmonic Response Model (System B). This will be the submodel.

Fig 2: Project Schematic

After creating the desired mesh, add a named selection at the cut boundaries called

**cut_face**. Add the following command snippet in the Setup branch.**!! Creates cut boundary NODE file****! WB will complain but boundarynodes.node file should be created****/prep7**cmsel, s, cut_face

nwrite, boundarynodes, node

finish

**/exit**The above step writes out a file listing the nodes and their coordinates which will be used for interpolation. After solving for the model, Ansys Workbench will flash a lot of e…