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#1 2013-08-05 13:34:23

m_golbs
Member
From: Germany
Registered: 2009-11-09
Posts: 126

FORC_NODA and REAC_NODA in DYNA_LINE_HARM

Hello,

I need in a modell with DYNA_LINE_HARM between nodes (LIAISON_DDL) forces. FORC_NODA and REAC_NODA are in DYNA_LINE_HARM not possible?

I want to write real and imag parts of Forces. With command give me forces between nodes of LIAISON_DDL - calc_forc_NONL over u4.53.11.pdf, sdls119a.comm?

If it possible to give forces without a DYNA_LINE_TRAN, only DYNA_LINE_HARM? About information I'm very happy.

Thanks and greeting
Markus

Last edited by m_golbs (2013-08-05 14:28:17)


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#2 2013-08-17 22:36:28

Thomas DE SOZA
Guru
From: EDF
Registered: 2007-11-23
Posts: 3,066

Re: FORC_NODA and REAC_NODA in DYNA_LINE_HARM

Hi,

Your demand is not clear.
If you mean you need to take into account linear relations in a frequency domain analysis then this information is to be given through the matrices you provide e.g. K the stiffness matrix (see the manual).

TdS

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#3 2014-12-02 12:56:51

Johannes_ACKVA
Member
From: Ingenieurbüro für Mechanik, DE
Registered: 2009-11-04
Posts: 753
Website

Re: FORC_NODA and REAC_NODA in DYNA_LINE_HARM

Thomas,
I think the problem of Golbs is simply that he can't calculate REAC_NODA and FORC_NODA after a harmonic analysis. It seems not to be possible with Code-Aster (version 12.2). I would need this feature also. So my question: is it already planned to implement  REAC_NODA and FORC_NODA in a harmonic result? I not, may I put a request in the bitbucket with some examples?

Regards
Johannes_ACKVA

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#4 2014-12-02 15:19:59

RichardS
Member
From: Munich, Germany
Registered: 2010-09-28
Posts: 560
Website

Re: FORC_NODA and REAC_NODA in DYNA_LINE_HARM

Hi,

isn't there a workaround?

I imagine that you could split the result for example in real and imaginary part with CREA_CHAMP( EXTR+C2R), than assemble it to a EVOL_ELAS with CREA_RESU
and then you simply calculate your forces from there?

Best regards,
Richard

Last edited by RichardS (2014-12-02 15:20:10)


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#5 2014-12-02 15:38:36

Johannes_ACKVA
Member
From: Ingenieurbüro für Mechanik, DE
Registered: 2009-11-04
Posts: 753
Website

Re: FORC_NODA and REAC_NODA in DYNA_LINE_HARM

Richard,
thank You for that idea. I did not try it for now, because I have found another way: adding discret elements at the nodes of support, then calculating the elm forces in these discret elm which are equal to the reaction force at these nodes

Regards
Johannes_ACKVA

______________________________________________________________________
CODE-ASTER-courses at Ingenieurbüro für Mechanik, Germany

*** CODE-ASTER INTRO + CONTACT + MATERIAL
    5 days, Mon 08 to Fri 12 of Dec 2014

*** CODE-ASTER  DYNAMIC ANALYSIS
    2 days, Thur 15  to Fri 16 of Jan 2015

*** CODE-ASTER  PYTHON
    3 days, 25  to 27 of Feb 2015


Ingenieurbüro für Mechanik
D 91717 Wassertrüdingen / Germany

www.code-aster.de                                                Training & Support for NASTRAN and CODE-ASTER

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