FAQ 000519 EN

1 December 2017

Robert Vogl Calculation RFEM RSTAB

What is the effect on the internal forces if I limit the number of iterations to '1' in the calculation parameters?

Answer

The calculation will be done faster. HOWEVER: Since only one iteration has been calculated, the results are only correct if there is also just one iteration required for the calculation. For example, this can be the case of load cases using linear static analysis. Also, object with nonlinear properties, such as tension and compression members, may not fail.

On the contrary, load combinations according to second-order analysis require an iterative calculation. Therefore, the results of one iteration only are not correct.

The number of possible iterations should always be sufficiently high. The number may also be much higher than the actually needed number of iterations, because the program will perform as many iterations as required. 

Result Table 4.0 shows the number of performed iterations (see Figure).

Keywords

calculation iteration calculation step

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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

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