Superelement in NASTRAN

[agi2007]

Dear collegues,
I have to generate end use a superelement for a modal analisys with MSC Nastran. Someone has an input file example?

ALF

 

[cosmos99]

Hi agi2007,
There is an extensive Nastran Super Element tutorial in the technical notes section of 6dof.com.

This is the index:
Article Index
Topics of Superelement analysis in MSC/NASTRAN
SuperElement glossary
Defining superelements in PATRAN
Performance issues with Superelements
Split database
Split database Examples
Non-linear analysis
Loading upstream superelements
Examples of Non-linear Analyses Using Superelements
Simple Nonlinear Run Using Superelements
Load History Analysis Using Superelements
Nonlinear Restart Using Superelements
Applying Thermal Loads to Superelements
Applying Thermal Loads to Superelements (2)
Enforced displacement with Superelements
CLOADs on Upstream Superelements
External superelements
general dialogue
External superelements examples
S.E. Example 1
S.E. Example 2
Dynamic Reduction for superelements
How to use dynamic reduction
What is CMS
Mode Truncation
Examples using CMS with superelements
Example 1 - Control Model
Example 2 - Full model
Example 3 - Half model using symmetry
Example 4 - Half model using image SEs and CMS
Example 5 - Half model using image SEs and CMS
Comparsion of Results of the CMS examples
Image Superelements in MSC.Nastran
Pitfalls and Caveats with Image Superelements
Image of External Superelements