topic Re: Get local axis of finite elements via API in Robot Structural Analysis Forum

(API) Get local axis of finite elements

Anonymous — Thu, 17 Dec 2015 10:43:16 GMT

Hi,

in the forum there is an example where you can get finite element results via API using an excell file and VBA.

Is there a possibility to get the orientation vectors for the local element system of the finite elements via API.

Re: Get local axis of finite elements via API

Rafal.Gaweda — Wed, 16 Dec 2015 15:45:09 GMT

No.

Re: Get local axis of finite elements via API

Anonymous — Thu, 17 Dec 2015 09:51:33 GMT

Hi Rafal, thanks for the answer. In my company we are trying to make an interface to Robot that would take nodes, finite element results for panels modelled in Robot and do reinforced concrete design in an home made application that has been used for the last 25 years, to design offshore gravity based structures. A similar interface exits for ANSYS. It seems that getting the orientation vectors for the local element system of the finite elements is not implemented in the API. If we have a simple panel let`s say a shear wall is there a possibility to get the orientation vectors of the panel local system? Thanks in advance, Alexander Ziotopoulos Multiconsult ASA www.multiconsult.no

Re: Get local axis of finite elements via API

Rafal.Gaweda — Thu, 17 Dec 2015 10:16:15 GMT

But you will not get FE results in native FE LCS.
Results are always projected due to results presentation settings RobotFeResultsParams.SetDirX ; if not set - "Automatic" (= along panel X LCS) direction is considered.
If you want to consider "flat panel" + results presented in Automatic way you can take panel LCS

Re: Get local axis of finite elements via API

Rafal.Gaweda — Thu, 17 Dec 2015 10:40:07 GMT

You may try - 1 FE = 1 panel and get LCS of this panel

I am attaching macro for creation panel for every single FE (make FE selection in Robot)

NOTE : huge number of panels in model reduces Robot performance, so be carefull using this approach on ALL (large number of) FEs in model

Re: Get local axis of finite elements via API

Anonymous — Thu, 17 Dec 2015 11:40:03 GMT

Thanks Rafal,

you mention ''If you want to consider "flat panel" + results presented in Automatic way you can take panel LCS``.

Is there a method doing that via API? Is it possible to provide an example how to take out vectors for Local axis X,Y,Z for a flat panel. That would simplify

the whole process a lot.

Thanks in advance,

Alexander Ziotopoulos

Multiconsult ASA

www.multiconsult.no

Re: Get local axis of finite elements via API

Rafal.Gaweda — Thu, 17 Dec 2015 11:50:14 GMT

Public Sub CommandButton1_Click()

Dim RobApp As New RobotApplication

    Cells(5, 1) = "Project"
    Cells(5, 2) = RobApp.Project.Name
 
    
    Dim RSel As RobotSelection
    Set RSel = RobApp.Project.Structure.Selections.CreateFull(I_OT_PANEL)
    Dim PanelCol As RobotObjObjectCollection
    Set PanelCol = RobApp.Project.Structure.Objects.GetMany(RSel)
    
    Dim X As RobotGeoPoint3D, Y As RobotGeoPoint3D, Z As RobotGeoPoint3D
    Dim Obj As RobotObjObject
    
    Set X = RobApp.CmpntFactory.Create(I_CT_GEO_POINT_3D)
    Set Y = RobApp.CmpntFactory.Create(I_CT_GEO_POINT_3D)
    Set Z = RobApp.CmpntFactory.Create(I_CT_GEO_POINT_3D)
        
    For ii = 1 To PanelCol.Count
        
        Set Obj = PanelCol.Get(ii)
        Obj.Main.Attribs.GetLCS X, Y, Z
        
        Cells(12 + ii, 3) = Obj.Number
        Cells(12 + ii, 4) = "LCS X=" + Str(X.X) + ";" + Str(X.Y) + ";" + Str(X.Z)
        Cells(12 + ii, 5) = "LCS Y=" + Str(Y.X) + ";" + Str(Y.Y) + ";" + Str(Y.Z)
        Cells(12 + ii, 6) = "LCS Z=" + Str(Z.X) + ";" + Str(Z.Y) + ";" + Str(Z.Z)
        
    Next ii

End Sub

Re: Get local axis of finite elements via API

Rafacascudo — Mon, 21 May 2018 12:26:34 GMT

Hi @Rafal.Gaweda ,

Does this work on Robot 2018 or 2019?

Re: Get local axis of finite elements via API

Rafal.Gaweda — Mon, 21 May 2018 12:39:55 GMT

Hi @Rafacascudo

Yes.

Re: (API) Get local axis of finite elements

Temo_Escudero — Sat, 06 Feb 2021 05:45:49 GMT

Hi, @Rafal.Gaweda, I have a question, is there any way to apply surface loads directly over the finite element in the way the wind pressure analysis does, using the ROBOT API?, I mean, how can I generate such presure maps programatically. Greetings!

Re: (API) Get local axis of finite elements

Stephane.kapetanovic — Sat, 06 Feb 2021 14:59:53 GMT

possible to create a surface load on contour points

https://forums.autodesk.com/t5/robot-structural-analysis-forum/api-macro-for-updating-panel-contour-loads-from-excel/m-p/4756971