No static force vector.

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

Hi all,

I'm analyzing the weldings in a beam of an earth moving machine. Some parts can be modeled as 2d shell while for some others I needed to create a 3d mesh. In a first tentative a created a 2d mesh for each element and I was able to run the analysis, but I noticed some inaccuracy in proximity of parts that can not be treated as 2d elements. So I improved the mesh treating this parts with 3d elements. Now I'm not able to run the analysis. During solving the log window prints this warning: 

 

*** WARNING # 1955  Static Loadcase 1 has zero static force vector.   This typically produces zero solution and zero compliance.

 

I linked the parts using spot weld connector (RIGID). In order to connect 3d elements with 2d shell I created a shell face upon each 3d element giving them a very thin thickness. I reassigned the nodes for each RBE3 element but this doesn't help me.

 

I attached the .hm file if someone wants to have a look:

 

https://www.dropbox.com/s/2v7fu0p4wd1msku/1_SIGMA_MAX_SEZ_4_MIDSURF_and_3D_1.hm?dl=0

 

Thanks for your support.

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited November 2017

    Hi @Ferrari248F1AQ

     

    Is it possible to share the model file using the file transfer link available in my signature?

     

    I can't access dropbox as my network blocks the same due to security reasons. 

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited November 2017
    Altair Forum User said:

    Hi @Ferrari248F1AQ

     

    Is it possible to share the model file using the file transfer link available in my signature?

     

    I can't access dropbox as my network blocks the same due to security reasons. 

     

    Sure! I've just sent it to you. Thank you!

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited November 2017

    Hi,

     

    I didn't got any mail notification from my FTP :| 

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited November 2017

    Got it thanks

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited November 2017

    Hi,

     

    There are some modelling issues. 

     

    Also component names for a couple of components starts with ^ which makes these components hidden or not exported to solver deck. 

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited November 2017

    Hi Prakash,

    thanks for your support. I noticed that the mesher added this character during some process but I ignored about its importance!

    Regarding modelling issues, can you give me some examples? 

     

    Thanks!

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited November 2017

    Hi,

     

    There are few free nodes. You can go to Equivalence panel (Shift+F3) to correct them. 

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