(COSMOSWorks Loads toolbar).The Gravity PropertyManager applies linear accelerations to a part or assembly document for use in structural and nonlinear analyses. You specify accelerations in the x, y, and z directions of a coordinate system defined by a reference plane or planar face. You can also define linear acceleration along a straight edge.
Gravity loading in each direction is calculated by multiplying the specified acceleration of gravity by the mass. The mass is calculated from the density value of the material. If you select a material from a default library, then the density is already defined. If you choose to input material properties manually, make sure to specify the density.
For nonlinear studies, you can define time-dependent accelerations of gravity.
To specify gravitational loading:
Do one of the following:
In the COSMOS AnalysisManager tree, right-click Load/Restraint and select Gravity.
-or-
Click COSMOSWorks, Loads/Restraints, Gravity.
-or-
Click Gravity
(COSMOSWorks Loads toolbar).
The Gravity PropertyManager appears.
Select a planar face, a reference plane, or a straight edge.
The selected reference appears in the Face, Edge, Plane for Direction box
under Selected Reference.
Under Gravitational Acceleration, do the following:
Select the desired system of Unit
you want to use to enter the acceleration values.
Enter values for the acceleration components.
If you select a reference plane or a planar face, specify at least one of the following:
Along
plane Dir 1 
. Type the value of the acceleration component
along direction 1 of the selected plane or face.
Along
plane Dir 2 
. Type the value of the acceleration component
along direction 2 of the selected plane or face.
Normal
to plane 
. Type the value of the acceleration component
normal to the selected plane or face.
In an assembly, you can use
reference geometry from the assembly or the components (parts and sub-assemblies)
of the assembly.
If you select a straight edge, specify:
Value
. Type the value of the acceleration along the selected
edge.
For nonlinear studies, you can define a time-dependent gravitational acceleration.
If necessary, under Symbol Settings, do the following:
Click Edit color to change the color of the gravitational acceleration symbols.
Click the spin arrows to increase or decrease the size of the gravitational acceleration symbols.
Click 
.