The following warning message is located in the model consistency check report:
* * * W A R N I N G - MODEL * * * W726-14: No anchors in current system
What does it mean and how to avoid?
As mentioned in warning message, the current model does not have an anchor component. Typically if a model does not have an anchor it would allow the piping system to rotate about one or more of the 3 global axis (i.e. Global X, Y, or Z) thus resulting in the following Error message being displayed when running an analysis:
---------------------------Error--------------------------- E801-1: FATAL ERROR : Unstable system. Need support at node xxx Dir X ---------------------------OK ---------------------------
However, if a model can be sufficiently restrained on all 3 global axis then no anchor is necessary. The easiest way to tell if a model is sufficiently restrained, run an analysis and see if the E801-1 Fatal Error message appears. If the Error message appears, there are 2 options:
1. Add a support as mentioned in the error message
or
2. Insert an anchor (i.e. Rigid or Flexible).
Note: if your actual as-built system does not include a rigid anchor, consider adding a flexible anchor with very low values for all 6 Translational and Rotational stiffness values.
Warnings Messages displayed in AutoPIPE
Bentley AutoPIPE