Symmetry

A plane symmetry around the coordinate origin can be selected for the calculation of symmetrical components. A model structure with complete geometry is recommended for this. For the calculation, however, only the positive area of the spatial axes is used, the result is then mirrored into the negative area. Both the geometry and the boundary conditions are mirrored. Therefore, for loads beyond the zero point (e.g.: area load of a symmetrical bridge), only the load portion for the positive coordinate space may be specified (halved force, corresponding to half the area, e.g.: only force on one of the bridge sides). For a correct calculation ALL boundary conditions must be symmetrical, this applies to fixations, forces and moments. Errors can easily happen, especially when defining moments.

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