Porous materials

Porous materials let you dampen acoustic wave propagation. These materials typically consist of a solid skeleton with pores or interstices. Acoustic waves can propagate through them.

You can use porous materials to model 3D acoustic absorbers by applying them to the elements in 3D solid mesh collectors. In Simcenter Nastran solutions, the porous material properties are written to the MATPOR bulk data entry.

In a Simcenter Nastran Acoustic or Vibro-Acoustic analysis, the Assign Materials, Manage Materials, and Physical Properties dialog boxes let you select the Porous material type. You can then select the following material models on the Porous Material dialog box:

• Craggs

• Delany-Bazley-Miki

• Johnson-Champoux-Allard

For more information about porous materials and their material properties, see Defining porous or equivalent porous materials.

Where do I find it?

Application	Pre/Post
Prerequisites	Simcenter Nastran as the specified solver.Acoustic or Vibro-Acoustic as the specified analysis type.
Command Finder	Assign Materials Manage Materials Physical Properties
Location in dialog box	Assign Materials or Manage Materials dialog box:Type = Porous→Create material →Porous Material dialog box→Acoustics tab→Properties group→Porous Models listPhysical Property Table Manager dialog box:Type = PSOLID - Acoustic Fluid→Create→Choose material →Type = Porous→Create Material →Porous Material dialog box→Acoustics tab→Properties group→Porous Models list

How do I

Define a porous material

Quick links

Command reference

Pre/Post video examples

Bulk Entry Descriptions

Simcenter 3D tutorials

Browse Simcenter 3D help by product area

Porous materials, Simcenter 3D 2021.1 Series

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