Critical Load Factor of Tapered Steel Frame 3: FE Model and RF-STABILITY

Tips & Tricks

The following post verifies the determined mode shapes or critical load factors of the previous beam structures using an FE model in RFEM (surface elements) and RF‑STABILITY.

You can quickly create such model in RFEM due to effective modelling tools (“Generate Surfaces from Members” here) and the well-arranged graphical user interface.

In RF‑STABILITY, critical load factors and the corresponding stability modes can be determined. For this, you can use linear eigenvalue solver or nonlinear stability analysis.

In our example, the linear eigenvalue solver (Lanczos method) determines the critical load factor of 2.26, which corresponds to the previous models of the structure.

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RFEM Other
RF-STABILITY 5.xx

Add-on Module

Stability analysis according to the eigenvalue method

RFEM Main Program
RFEM 5.xx

Main Program

Structural engineering software for finite element analysis (FEA) of planar and spatial structural systems consisting of plates, walls, shells, members (beams), solids and contact elements