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Applying One-Sided Displacement Constraint in a Stationary Study

Posted 2025/02/06 4:14 JST Version 6.3 1 Reply

Václav Navrátil
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I am modeling a solar panel with a pin-like support (cylinder) that is attached to the panel at one end, while the free end touches a frame (which I am not modeling). In reality, this pin prevents motion in the +Y direction (stopping the panel from moving) but does not constrain motion in the -Y direction (allowing free movement).

I need to correctly apply a one-sided constraint at the free end of the pin, so that: - Motion in the +Y direction is fully constrained (u_y = 0 when u_y > 0) - Motion in the -Y direction is completely free (u_y < 0 allowed) - Motion in the X and Z directions remains free

What is the correct way to apply a one-sided constraint in COMSOL?

Thanks Václav

1 Reply Last Post 2025/02/06 4:46 JST
Henrik Sönnerlind COMSOL Employee

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Posted: 6 months ago 2025/02/06 4:46 JST

In a Prescribed Displacement node, select Limited for Displacement in y direction. Then, enter '0' for one of the limits.

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Henrik Sönnerlind
COMSOL
In a *Prescribed Displacement* node, select *Limited* for *Displacement in y direction*. Then, enter '0' for one of the limits.

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