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Onshore foundation

Dear developers,

First of all I would like to thank you for sharing the Qblade.

I would like to understand if the software is able to represent the foundation nonlinear behaviour at the tower base by defining a curve moment – rotation?

From what I saw, the simulation is only possible by assuming that the turbine is fixed at the bottom. Is that correct?

 

Thank you,

Best regards,

Mário Sobrinho

Hi Mário,

it is possible to define springs (and also dampers) with custom p-y curves in QBlade’s substructure definition (see: https://docs.qblade.org/src/theory/environment/soil/soil.html).

These springs/dampers can then be constrained to any DoF of a structural node using the SUBCONSTRAINTS table (see here: https://docs.qblade.org/src/user/turbine/structure.html#cable-elements-ground-fixing-and-station-keeping-parameters).

We will upload an example of an offshore monopile foundation, which is modeled using these features, that can be used as a template in the next few days!

BR,

David

 

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Hi David,

 

Thank you.

I suppose that instead of force-displacement curves, I can use moment rotation nonlinear curves, right?

 

Best regards,

Mário

Hi Mário,

yes, that should work. In this case you need to link the spring to one (or more) rotational DoF’s in the constraint table and specify the (nonlinear) moment rotation relationship in Nm/rad (instead of N/m for linear springs).

BR,

David

Hi David,

 

Thank you.

I’ll then wait for template.

 

Best regards,

Mário