General Bushing
Tools → Curve Manager
Edit a general bushing property file (*.gbu). Learn about General Bushing.
You can edit a general bushing property file by modifying the static stiffness curves, loss angles, shape and coupling options. You can also enter data in the Property Table view. See Modifying Curves.
Besides the Property Table, the Curve Manager lets you edit a general bushing property file's:
■Six static stiffness curves (three translational and three rotational characteristics)
■Six loss angles
Bushing shape
■Rectangular - No interaxial coupling in force/torque calculations.
■Cylindrical - Forces/torques in x and y directions are coupled. Force/torque in z direction is independent.
■Spherical - Forces/torques in and about all three directions are coupled.
Coupling
■Uncoupled - Uncouple Bouc-Wen force from linear stiffness force.
■Coupled - Couple Bouc-Wen force with linear stiffness force.
■Revised - Revised Bouc-Wen force with linear stiffness force.
The following table explains the options that are available in the Curve Manager plot view. Learn about Curve Manager.
For the option: | Do the following: |
|---|---|
Slope | Enter the slope of the curve that defines the velocity-force relation. |
Limits | Enter the upper and lower x values for the curve. |
Points/Segs | Specify the number of points or segments for the curve. You can: ■Enter the number of points or segments. ■Right-click  and select  to create a function expression that defines the vertical (y) values in terms of the horizontal (x) values. You can use only one independent variable (x) to describe the functional relation. You can use any valid FORTRAN mathematical operator, such as SIN, **2, and so on. |
Note: | The pull-down menus in the upper left corner of the Curve Manager allow you to select an active plot (translational and rotational stiffnesses) and components (x-y-z axis). |