SPCD and DMIG

Altair Forum User
Altair Forum User
Altair Employee
edited October 2020 in Community Q&A

Hi,

I'm trying to use superelement to simplify a model and focus on a single component of this model.

the loading is composed of :

- gravity load

- imposed displacement using SPCD.

this loading is not directly applied on the component I am trying to isolate and thus should be included in the PAX.

 

When I generate the .pch file and use it in the simplified model the obtained results (deformed structure for instance) are very different from the ones obtained with the original model. It seems that the inforced displacement is not taken into account. This assumption has been verified as I removed the SPCD from the original FEM and obtained the same results as with the condensed MEF.

 

is there any special care to take when using DMIG and SPCD? Are they compatible?

 

thank you

 

 

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Answers

  • Rahul_P1
    Rahul_P1
    Altair Employee
    edited November 2015

    The LOAD static combination card will not combine the SPCD with Grav, this could be the reason,

     

    See comment  6. SPCD load SIDs cannot be referenced by LOAD data.

     

    A possible work around could be to have the grav as the first case then use the statsub preload referencing the spcd,

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited November 2015

    Thank you for your answer.

    I found a solution to fix this problem (replacing the SPCD by a FORCE card that will induce the same displacement) but this is not staisfying.

    I will work on your solution and let you know.

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