Notes

When a structure is rotating and the Coriolis or gyroscopic effect is taken into account (CORIOLIS), nodes lying on the rotation axis generally exhibit an elliptical orbital motion. The PLORB command displays the orbit of each rotating node as well as the deformed shape at time t = 0 (the real part of the solution).

To print the characteristics of the orbital path traversed by each node, issue the PRORB command.

The PLORB command is valid for line elements (such as BEAM188, BEAM189, PIPE288, and PIPE289). PLORB is not supported for beam elements with the warping degree of freedom activated.

Your model must also involve a rotational velocity (OMEGA or CMOMEGA) with Coriolis enabled (CORIOLIS).

Because orbit data is written in the database, a SET command must be issued after the PLORB command to ensure proper output for subsequent postprocessing commands.

The coordinate system for displaying nodal results must be global Cartesian (RSYS,KCN = 0). PLORB is not supported if nodes are rotated in a cylindrical coordinate system.

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