Learning Forum

[marco.pedata]

Hello Ansys community,

I try to do a transient structural analysis of a rope.
To reduce computation time i modelled the rope using beams.
However, there is no convergence.
Moreover the rope does not bend (would be expexted as a result of prescribed displacement) but contracts or strectches depending on the direction of the prescribed displacement.

I would appreciate tips that can pinpoint me to my errors.

[Erik Kostson]

Hi

You need first a pretension (so pull cable to put it in tension), and then in a second step add forces to look at the bending of it.

 

There are many posts if you search about this.

/forum/forums/topic/need-help-in-modeling-pre-tensioned-cable/

All the best

Erik 

[marco.pedata]

Hi Erik,

thank you. I will try that.

best regards,

Marco

[marco.pedata]

 

Hi,

I set the model type of the rope to cable and inserted a APDL Command to apply pretension and set the number of load steps to 2.

However, the model still does not converge.

Perhaps it has something to do with how I Prescribed the displacement (tabular data is zero until time for second load step starts because I did not find a way to insert tabular data that begins at the second load step)
Do you have further advise for how to resolve this issue?

Thank you in advance,

Marco