How to do static analysis in SOFA?

[SustechShenCong]

If I know the displacement field of the model (i.e. I know the displacement of each node, however, the force field is unknown which needs to be computed). How can I do static analysis to calculate the force field, which leads to this known displacement field?

[hugtalbot]

Hi @10043816beau

To do so, you can use the StaticSolver instead of using a time-integration scheme.

Hope this helps

[SustechShenCong]

It does not work, I think there is not such function in SOFA.
For example, in my Cantilever beam case. In COMSOL, I can set the displacement field constrained 'u' and access the internal force field corresponding to this displacement through static study, see below

And the result of internal force is below

And, in SOFA, I set the displacement field by

(note: 'position' is the sum of initial position and the displacement field 'u' )
I use the "StaticSolver":
root.addObject('StaticSolver')
However, the result is below

Obviously incorrect !
By the way, I wanna know how SOFA works when I press the "Animate" button.

[hugtalbot]

Hi @10043816beau

I see, you want to constrain the displacement of some points, not defining their initial position. Is this correct?

If so, you can use the ProjectiveConstraint you need, e.g. AffineMovementProjectiveConstraint or LinearMovementProjectiveConstraint

Let me know if this helps

[github-actions[bot]]

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@SustechShenCong
Feedback has been given to you by the project reviewers, however we have not received a response from you. Without further news in the coming weeks, this discussion will be automatically closed in order to keep this forum clean and fresh 🌱 Thank you for your understanding

[github-actions[bot]]

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@SustechShenCong
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