Parameter

Values

Description

FLLWER

<-1, 0, 1, 2, 3>

Default = 1

Parameter for the calculation of follower forces introduced by pressure loads (only PLOAD4 bulk data entry) and concentrated forces (only FORCE1/FORCE2 bulk data entries) in large displacement nonlinear analysis.

= -1 or 0: Follower force calculation is deactivated.

= 1: Follower effect is enabled.

For pressure load, both the changes of element surface area and the direction of the load are involved to calculate the follower force.

For concentrated force, only the force direction is involved.

= 2: Follower effect is enabled.

For pressure load, only the change of element surface area is involved to calculate the follower force.

For concentrated force, only the force direction is involved (same effect as FLLWER = 1).

= 3: Follower effect is enabled.

For pressure load, only the change of load direction is involved to calculate the follower force.

For concentrated force, only the force direction is involved (same effect as FLLWER = 1).