Defining PBUSH structural damping (Nastran)

If you are working with Simcenter Nastran, when you create a PBUSH type of physical property table in Pre/Post, you can use options on the Damping tab in the PBUSH dialog box to define structural damping for each degree-of-freedom for CBUSH elements.

The structural damping options in the PBUSH dialog box let you specify separate structural damping values for the X, Y, and Z translations and rotations. The values you specify correspond to the GE1, GE2, GE3, GE4, GE5, and GE6 fields in the PBUSH bulk data entry. If you define a value for any of the Structural options on the Damping tab, you should define a value for all degrees-of-freedom that are critical to the result, because a blank field defaults to a value of zero.

In Simcenter Nastran, the BSHDAMP parameter controls whether the software ignores any of the GE2-GE6 fields and only use the GE1 field you specified for the physical property table. In Pre/Post, the BSHDAMP list in the Solution Parameters dialog box (available from the Modeling Objects Manager dialog box) lets you set this parameter.

• If you select SAME (PARAM, BSHDAMP=SAME), the software ignores the Y and Z translation and the X, Y, and Z rotation options and only considers the single, structural damping value defined in the X Translation box in the PBUSH physical property table dialog box.

• If you select DIFF (PARAM, BSHDAMP=DIFF), the software considers values you specify in the Y and Z translation and the X, Y, and Z rotation boxes in the PBUSH physical property table dialog box.

For more information, see Specifying parameters for Nastran analyses, and PBUSH in the Simcenter Nastran Quick Reference Guide.

How do I

Define physical properties

Assign an existing physical property table to a mesh collector or element-associated data

Manage physical property tables

Override a physical property table definition

Learn more

Defining physical properties

Defining PSHELL structural damping (Nastran)

Torsional mass moments of inertia for CROD and CBAR elements (Nastran)

Concentrated Mass

Beam

Duct

Thin Shell

Multi-Layer Shell

PCB Stack

Quick links

Command reference

Pre/Post video examples

Bulk Entry Descriptions

Simcenter 3D tutorials

Browse Simcenter 3D help by product area

Defining PBUSH structural damping (Nastran), Simcenter 3D 2021.1 Series

© 2020 Siemens

window.mainLanguage="en_US"

window.delivId=""

window.projectId=""

MathJax.Hub.Config({ TeX: { extensions: ["autoload-all.js"] }, tex2jax: { displayMath: [ ] }, "SVG": { scale: 125 } });