# PARAM, PBUSHTF

Bulk Data Entry Specifies the reference frequency value for scaling factor lookup to update the nominal PBUSH Stiffness (K) values.

Parameter Values Options Description
PBUSHTF <Real>

No default

FREQ This parameter is used to specify the reference frequency value for scaling factor lookup to update the nominal PBUSH Stiffness (K) values. The scaling factor values are multiplied with the nominal PBUSH Stiffness (K) values to generate the scaled K values.
The scaling factor lookup utilizes the following two options:
1. TIDi tables for corresponding dof on the KSCALE continuation line on PBUSHT and/or,
2. TRA and/or ROT tables on this parameter (overridden by KSCALE TIDi).
See Comment 1.
<Integer>

Default = Blank

TRA Used in conjunction with FREQ, to lookup the scaling factor to update the nominal PBUSH Stiffness (K) values for Translational Degrees of Freedom (DOF 1 through 3). The specified integer value references a TABLED1 Bulk Data Entry consisting of Frequency (X) versus Stiffness Scaling Factors (Y).
<Integer>

Default = Blank

ROT Used in conjunction with FREQ, to lookup the scaling factor to update the nominal PBUSH Stiffness (K) values for Translational Degrees of Freedom (DOF 1 through 3). The specified integer value references a TABLED1 Bulk Data Entry consisting of Frequency (X) versus Stiffness Scaling Factors (Y).