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Structural analysis guidelines for generation of Finite Element Models.

Some general guidelines are given to prepare a sound and proper FE model to use the FEMDS code checker for a buckling or a frame structure check.

The following modelling technics need to be observed:

For the structural analysis of plate buckling:

Note that the buckling Eigenvalue in general leads to too optimistic values for elastic buckling and using a 'rule of thumb' factor of 2.0 leads to a too heavy design.  This is explained in 'Why the buckling Eigenvalue is not a trustful way to estimate buckling.'

Please also notice that when the effective width of panels is smaller than the distance between the stiffeners, this has an influence on results of an elastic Finite Element Model. Click on the influence of the effective width on de cross section to find out what is meant.

Ensure that you are always aware of the limitations of the applicable standards. In general the limitations in the software are similar to what is stated in the rules.

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