ansys.mapdl.core.Mapdl.cgomga#

Mapdl.cgomga(cgomx='', cgomy='', cgomz='', **kwargs)#

Specifies the rotational velocity of the global origin.

Mechanical APDL Command: CGOMGA

Parameters:
cgomxstr

Rotational velocity of the global origin about the acceleration system X, Y, and Z axes.

cgomystr

Rotational velocity of the global origin about the acceleration system X, Y, and Z axes.

cgomzstr

Rotational velocity of the global origin about the acceleration system X, Y, and Z axes.

Notes

Specifies the rotational velocity of the global origin about each of the acceleration coordinate system axes. The location of the acceleration coordinate system is defined with the cgloc command. Rotational velocities may be defined in these analysis types:

  • Static ( antype,STATIC)

  • Harmonic ( antype,HARMIC) – full, VT [ CGOMGA_FN_VT_KRY ], Krylov [ CGOMGA_FN_VT_KRY ], or mode-superposition [ CGOMGA_mode-sup_LoadSupport ]

  • Transient ( antype,TRANS) – full or mode-superposition [ CGOMGA_mode-sup_LoadSupport ]

  • Substructuring ( antype,SUBSTR)

  • Modal ( antype,MODAL)

Loads for VT and Krylov methods are supported as long as they are not:

  • complex tabulated loads (constant or trapezoidal loads in tabulated form are supported)

  • used in conjunction with Rotordynamics ( coriolis,on).

In a mode-superposition harmonic or transient analysis, you must apply the load in the modal portion of the analysis. Mechanical APDL calculates a load vector and writes it to the MODE file, which you can apply via the lvscale command.

See Acceleration Effect acel, cgloc, dcgomg, domega, and omega.

See Analysis Tools

The cgomga command supports tabular boundary conditions (TABNAME_X, TABNAME_Y, and TABNAME_Z) for CGOMGA_X, CGOMGA_Y, and CGOMGA_Z input values ( dim ) for full transient and harmonic analyses.

This command is also valid in PREP7.