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Sine sweep excitation in direct transient

Yuri S.

Hi,

Does anybody know if it is possible to enforce a sweep (chirp) excitation for a nonlinear transient analysis?

Thanks,
Yuri

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Accepted answers

Adriano_Koga

Hi sir,
Thank you for the answer.
Yes, this seems to be a quite time consuming procedure.

Isn't there a way to express a forcing term through a table? (One in which functions can be expressed).
I know there is something similar in other softwares (eg MARC).

Hi @Yuri S.

The only way i'm aware of is to define these as tables/curves, explicitly defined.

But you can easily create then into Compose or Excel, generate a CSV/TXT file an import to HM as a table (Utiliy>>Table Create).

In HW2021, just create a curve, and copy and paste from Excel to your curve editor.

All comments

Adriano_Koga

as far as I know, you would need to apply this as an explicit curve (TABLED1) entity, and associate it to your TLOAD1 card.

BUT, for a NL Transient card this would probably be very time consuming.

Yuri S.

Hi sir,
Thank you for the answer.
Yes, this seems to be a quite time consuming procedure.

Isn't there a way to express a forcing term through a table? (One in which functions can be expressed).
I know there is something similar in other softwares (eg MARC).

Adriano_Koga

Hi sir,
Thank you for the answer.
Yes, this seems to be a quite time consuming procedure.

Isn't there a way to express a forcing term through a table? (One in which functions can be expressed).
I know there is something similar in other softwares (eg MARC).

Hi @Yuri S.

The only way i'm aware of is to define these as tables/curves, explicitly defined.

But you can easily create then into Compose or Excel, generate a CSV/TXT file an import to HM as a table (Utiliy>>Table Create).

In HW2021, just create a curve, and copy and paste from Excel to your curve editor.

Yuri S.

Hi @Yuri S.

The only way i'm aware of is to define these as tables/curves, explicitly defined.

But you can easily create then into Compose or Excel, generate a CSV/TXT file an import to HM as a table (Utiliy>>Table Create).

In HW2021, just create a curve, and copy and paste from Excel to your curve editor.

I missed out this valuable piece of information!

Thank you very much.
Yuri