Total Displacement of Result Combinations
Technical Article
By means of result combinations, it is possible to create, among others, the envelopes for internal forces and deformations. Thus, the user can quickly find the maxima and minima for the later design.
However, special attention should be paid to the display of the global total displacement u. This is determined using the following formula:
u = √(uX2 + uY2 + uZ2)
The related resulting deformation for load cases and load combinations is displayed accordingly.
Together with the result combinations, also the maximum deformation components of the directions are calculated. This results in a superposition of deformations from different load cases. The result is shown in the third picture.
The result of the total displacement of the RC does not reflect the overall displacement of the individual load cases nor their qualitative distributions. For example, if you consider the calculation of the maximum total displacement u, max = 220 mm, it turns out that it is determined with the maximum deformation in the Z-direction from load case 1 and the maximum deformation in the Y-direction from load case 2.
The total deformation of a structure should therefore be evaluated in load cases or load combinations.
Author
Dipl.-Ing. (FH) Lukas Sühnel
Product Engineering & Customer Support
Keywords
Deformation Total displacement Result combination
Links
- FEA Software RFEM | Automatic Generation of Combinations
- Structural Frame & Truss Analysis Software RSTAB | Automatic Generation of Combinations
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