Implicit for Static and Explicit for Dynamic

[Ovoma]

Hello,

I just have two quick question.

Can I use implicit integration method for static loading first (for buildings, gravity loads) and then, start dynamic analysis using explicit integration method?

Also I want to know if "ModalDamping" command can be used when we use explicit integration method? I think when the "ModalDamping" command is used with explicit integration, the following error message is appeared and the damping is not used:
IncrementalIntegrator::getVel() - not implemeneted for this integrator

Thanks!
Ovoma

[selimgunay]

you can use load control for gravity. Explicit methods have stability criterion and they won't work if this criterion is not met. Particularly if you have massless rotational degrees of freedom, explicit will not work

[Ovoma]

Thanks for your reply,

So I just want to know if "ModalDamping" command can be used when we use explicit integration method?

[selimgunay]

According to the error message that you get, it is not implemented yet for explicit integration. Can you try with Implicit Newmark and see if you get the same message?

[Ovoma]

I checked all the implicit methods for modal damping command and they worked well.
The above error message appeared only when the explicit method was used with modal damping command.

[selimgunay]

Then, it is not implemented yet for the Explicit integration. We will include it as soon as possible.