Define a porous material

You can create porous materials for Simcenter Nastran acoustic and vibro-acoustic analyses.

You can create materials only if the Allow Local Materials customer default is selected.

The following example shows you how to define a porous material with a Delany-Bazley-Miki material model.

1. Make the FEM file the work part and displayed part.

2. Choose Home tab→Properties group→Manage Materials or Assign Materials .

3. From the Type list, select Porous.

4. Click Create material .

5. In the materials dialog box, in the Name - Description box, type a name for the material.

6. In the Properties group, in the Mass Density (RHO) box, enter 1.225E-9 in units of kg/mm^3.

7. On the Acoustics tab→Properties group→Porous Models list, select Delany-Bazley-Miki.

8. In the Speed of Sound (C) box, enter 340000 in units of mm/sec.

9. In the Static Flow Resistivity box, enter 8.7e-08 in units of N-sec/mm^4.

10. In the Porosity entry box, enter 0.97.

11. From the Frame Type list, select Limp Frame.

12. In the Frame Density box, enter 3.1e-08 in units of kg/mm^3.

13. Click OK.

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Porous materials

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Define a porous material, Simcenter 3D 2021.1 Series

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