Adams Basic Package > Adams Solver > Welcome to the FORTRAN Version of Adams Solver > Adams Solver (FORTRAN) Commands > PART

PART

The PART command redefines and/or lists the data for a PART statement. Although you cannot redefine the center-of-mass marker, the inertia marker, the part orientation, or the part initial conditions, you can redefine the part mass and the part principal moments of inertia about the x-, y-, and z-axis of the principal axis coordinate system.

Format

PART/id [,MASS=r] [,IP=xx,yy,zz] [,LIST]
 
[ ] Optionally select the item

Arguments

 
IP=xx,yy,zz
Respecifies the principal moments of inertia about the x-axis, the y-axis, and the z-axis of the principal axis coordinate system.
LIST
Lists the current values of the data in the PART statement.
MASS=r
Respecifies the part mass.
 
Caution:  
■Do not respecify the IP argument if the PART statement IP argument includes products of inertia (that is, xy, xz, and yz) and/or if the PART statement defines an inertia marker (IM) different from the center-of-mass marker (CM). This is because the IP argument values (xx, yy, and zz) are with respect to the part principal axis coordinate system. The principal axes of a part are the coordinate axes about which mass moments are zero, that is, for which the inertia matrix is diagonal.
■Part velocities do not change if you use the PART command to alter the mass or the principal moments of inertia. Adams Solver (FORTRAN) applies no conservation of momentum constraints.

Examples

PART/2, MASS=10
This PART command respecifies the mass of Part 2.
PART/5, IP=0,3,6, LIST
This PART command respecifies the principal moments of inertia of Part 5 about the x-, y-, and z-axis of the principal axis coordinate system and lists all the data for Part 5.