Function
- Enter initial axial forces into selected members for geometric stiffness calculation.
- When cable elements are used, the self-weight of the cables should be inputted so that it can be considered in the analysis.
Call
From the Main Menu select [Misc.] tab > [Type : Initial Forces] > [Initial Forces] > [Large Displacement] > [Initial Forces for Geometric Stiffness]
Input
Options
Add/Replace : Enter new or replace existing initial axial forces in selected members.
Delete : Delete entered initial axial forces in selected members.
Initial Force
Enter initial axial forces for geometric stiffness calculation.
Direction : Select the direction of initial axial forces.
Axial : Apply the entered forces as elements' axial forces.
Global - X Projection : Apply the force in the GCS X-direction. Auto-compute and enter the axial forces based on the placement directions of the selected elements
Global - Y Projection : Apply the force in the GCS Y-direction. Auto-compute and enter the axial forces based on the placement directions of the selected elements
Global - Z Projection : Apply the forces the GCS Z-direction. Auto-compute and enter the axial forces based on the placement directions of the selected elements
Force: Initial Force