**CGLOC****CGLOC**, `XLOC`

, `YLOC`

, `ZLOC`

**Specifies the origin location of the acceleration coordinate
system.**

`XLOC`

, `YLOC`

, `ZLOC`

Global Cartesian X, Y, and Z coordinates of the acceleration
coordinate system origin.

## Notes

Specifies the origin location of the acceleration coordinate
system with respect to the global Cartesian system. The axes of this
acceleration coordinate system are parallel to the global Cartesian
axes.

A structure may be rotating about the global Cartesian origin
[**OMEGA**, **DOMEGA**], which may in
turn be rotating about another point (the origin of the acceleration
coordinate system), introducing Coriolis effects. The location of
this point (relative to the global Cartesian origin) is specified
with this **CGLOC** command. For example, if Y is
vertical and the global system origin is at the surface of the earth
while the acceleration system origin is at the center of the earth, `YLOC`

should be -4000 miles (or equivalent) if the rotational
effects of the earth are to be included. The rotational velocity
of the global Cartesian system about this point is specified with
the **CGOMGA** command, and the rotational acceleration
is specified with the **DCGOMG** command.

The rotational velocities and accelerations are mainly intended
to include mass effects in a static (**ANTYPE**,STATIC)
analysis. If used in dynamic analyses, no coupling exists between
the user input terms and the time history response of the structure.
See Acceleration Effect in
the *Mechanical APDL Theory Reference* for details. Related commands are **ACEL**, **CGOMGA**, **DCGOMG**, **DOMEGA**, and **OMEGA**.

See Analysis Tools in the Mechanical APDL Theory Reference for more information.

This command is also valid in PREP7.