Modal Analysis | Solution methods for eigenvalue problem

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Description

In this video I would like to show you how you can choose the solving method for your modal analysis and compare the results of the different solving methods using a small example system.

With the analysis add-on Modal Analysis you can calculate eigenvalues ​​and other important information of your modal analysis in RFEM 6. You can specify the eigenvalue solver in the modal analysis settings and you can currently choose between the 3 listed solving methods.

The selection depends on the size of the system to be considered and is more a question of performance than accuracy. The methods are all suitable for determining exact eigenvalues. In future, you will find the solution methods explained in the online manual. However, you can also read the background to this in the previous RF-DYNAM Pro manual.

You can define several modal analysis settings and then compare the results in 3 load cases.

As you can see, the results of our small example system are very similar for all 3 solving methods.

Keywords

RFEM6 Modal analysis Eigenvalue Add-on Integrated add-ons Load Dynamic Dynamic Analysis FEM software FEA software Finite element software Construction Civil engineering Structural engineer Structural design Structural designer Structural analysis RFEM 6 RSTAB 9 Dlubal Software

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  • Updated 25 January 2022

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