Modelling with bar2-elements, what is the right approach? Why do i get a warnging 1955

mechengstud
mechengstud Altair Community Member
edited October 2020 in Community Q&A

Hello everyone, 

i'm modelling a frame with bar2-elements and i am very new to hyperworks and also to bar/beam-elements. The problem i got, is that optistruct gives me a warning 1955 (Static Loadcase 1 has zero static force vector). A loadcase is defined, a force is defined with the right magnitude!

I think i modelled the bar2-elements the wrong way (connectivity at the nodes), here is what i did, please tell me if any of these steps are wrong:

1. Creation of nodes at the positions where frame parts meet.

2. Connecting the nodes with lines 

3. linemesh those lines


I think the problem might be that there was no definition on how two connected parts of the frame behave to each other and that some sort of dof-coupling at the nodes created in step 1 should be done. So how can i couple the dofs of two elements meeting at a defined node? 
 

Or is something else the problem?

Best regards!
mechengstud

 

<?xml version="1.0" encoding="UTF-8"?>elementsmeetingatnode.PNG

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited January 2016

    Hi,

     

    Can you clear all temporary nodes you have created and apply the load again?

  • mechengstud
    mechengstud Altair Community Member
    edited January 2016

    That was the solution to the problem, thank you!

    Is there a way to hide these temporary nodes while applying loads and constrains so that i can't select them?

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited January 2016

    You can clear all temp nodes using Shift+F2 panel.

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