For which application is the option 'Calculate Eigenvector for Unstable Model...' suitable in RF-STABILITY?


This function is intended to detect modeling errors in the structure that may lead to instability. Using this method, it is possible to calculate such systems and to determine the cause of the instability graphically.

This function is not suitable for the following problems:
  • Calculation aborts due to overloadings (stability problems)
  • Determination of buckling curves and buckling modes
If the system is stable and only stability problems occur during the calculation according to the second-order analysis, all results are set to 0 with this function.

The problem solving of instabilities is described in detail in FAQ 2257 .


Instability Eigenvector Buckling mode Buckling



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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

Price of First License
3,540.00 USD
RFEM Other

Add-on Module

Stability analysis according to the eigenvalue method

Price of First License
1,030.00 USD