The MSC.ADAMS programs require that the user define the units used in the component model, while Abaqus does not. Therefore, during the creation of the modal neutral file the user must declare explicitly the units used in the model. The approach to doing this in the Abaqus Interface for MSC.ADAMS is very similar to the way it is done in the ADAMS/View Units Settings dialog box. A predefined units system can be specified by using the units option on the Abaqus Interface for MSC.ADAMS execution procedure. Alternatively, the individual length, mass, force, and time units can be specified by using the length, mass, force, and time options on the Abaqus Interface for MSC.ADAMS execution procedure. Any individual units that are specified override the corresponding units in the units system. The default units system is mks. The valid units systems for the units option are listed in Table 3–1.
Table 3–1 Valid units systems.
| Units System | Length Units | Mass Units | Force Units | Time Units |
|---|---|---|---|---|
| mks | meters | kilograms | newtons | seconds |
| mmks | millimeters | kilograms | newtons | seconds |
| cgs | centimeters | grams | dyne | seconds |
| ips | inches | pound-mass | pound-force | seconds |
The valid options for each of the length, mass, force, and time options are as follows:
Length units
Valid options for the length units are
meters
millimeters, mm
centimeters, cm
kilometers, km
inches, inch, in
feet, foot, ft
mile
Mass units
Valid options for the mass units are
kilograms, kg
megagram, tonne
gram, g
pound_mass, lbm, pound
slug
kpound_mass
ounce_mass
Force units
Valid options for the force units are
newtons, N
knewton, kN
kilogram_force, kgf
dyne
ounce_force
pound_force, lbf, pound
kpound_force
Time units
Valid options for the time units are
seconds, sec
milliseconds, ms
minutes, min
hours