Analysis diagnostics : Error norm

Static analysis

In a static analysis the error norm is calculated only when ill-conditioning is suspected. The calculation is as follows:

Calculate the residual and solver for residual displacements

and then the error is

where

These error norms are reported in the Analysis details output.

Modal analysis

In a modal analysis the error norm is always calculated. The calculation for a dynamic analysis is as follows:

and for a buckling analysis:

These are reported in the Analysis details output.