ProductsAbaqus/StandardAbaqus/Explicit
TypeModel data
LevelPartPart instanceAssembly
Optional parameters
 ALPHA

Set this parameter equal to the ${\alpha}_{R}$ factor to create inertia proportional damping for added inertia associated with this option when used in directintegration dynamics. This value is ignored in modal dynamics. The default is ALPHA=0.0. (Units of T^{−1}.)
 COMPOSITE

This parameter applies only to Abaqus/Standard analyses.
Set this parameter equal to the fraction of critical damping to be used with the beam elements when calculating composite damping factors for the modes when used in modal dynamics. The default is COMPOSITE=0.0.
This value is ignored in directintegration dynamics. It is also ignored in modebased analyses based on the SIM architecture, where the COMPOSITE MODAL DAMPING option should be used instead.
Data line to define additional beam inertia
 First line
Mass per unit length.
Local 1coordinate of the center of mass within the beam crosssection, ${x}_{1}$.
Local 2coordinate of the center of mass within the beam crosssection, ${x}_{2}$.
Orientation angle for the first axis of the oriented system relative to the first beam crosssectional direction in which the rotary inertia is given, $\alpha $ (in degrees). Only relevant for beams in space; otherwise, leave blank.
Rotary inertia around the center of mass about the 1axis in the local inertia system, ${I}_{11}$.
Rotary inertia around the center of mass about the 2axis in the local inertia system, ${I}_{22}$. Only relevant for beams in space; otherwise, leave blank.
Product of inertia, ${I}_{12}$. Only relevant for beams in space; otherwise, leave blank.
The rotary inertia should be given in units of ML. Abaqus does not use any specific physical units, so the user's choice must be consistent.
Repeat this set of data lines as often as necessary to define the additional beam inertia.