ModelType of a model using Python API

62 views
Skip to first unread message

Alexandre Rubenstrunk

unread,
Mar 19, 2024, 4:37:49 PMMar 19
to OpenVSP

Hello everyone,

I'm attempting to utilize the VLM method of OpenVSP with the API. To do this, I'm using VSPAero and specifying the method I want to use like this:

analysis_method = [vsp.VORTEX_LATTICE]

vsp.SetIntAnalysisInput( analysis_name, "AnalysisMethod", analysis_method, 0 )

However, when I execute VSPAero, I notice in the Python terminal the following line: Modeltype:PANEL.

From what I've observed, this indicates that even though I specified the method I want to use, it reverts back to the Panel Method. Does anyone have an idea on how to change this parameter?

Best regards,

Alexandre

Peter Hauschild

unread,
Apr 10, 2024, 11:45:47 AMApr 10
to OpenVSP
Hi,
I have some to try, but i do not know any of theses are the right answer.
Firstly, i might think that, the API does not find the DegenGeom, or it finds a CompGeom, which is compatible with the Panel method solver not the VLM.
Maybe skip the line of code, as i think vsp.SetAnalysisInputDefaults(analysis_name) sets the solver to VLM automatically.
Lastly, it might just be a bug. If you only see a DegenGeom file, and there are no other files in the folder it has to be VLM.

Alexandre Rubenstrunk

unread,
Apr 10, 2024, 12:13:11 PMApr 10
to OpenVSP
I actually find the solution, if someone need the code it this one: 
    # Make sur that the model use is VLM
    analysis_name = "VSPAEROComputeGeometry"
    vsp.SetAnalysisInputDefaults(analysis_name)
    analysis_method = list(vsp.GetIntAnalysisInput(analysis_name, "AnalysisMethod" ))
    analysis_method[0] = vsp.VORTEX_LATTICE
    vsp.SetIntAnalysisInput(analysis_name, "AnalysisMethod", analysis_method)
    res_id = vsp.ExecAnalysis( analysis_name )
It is may be not perfect but it work how it needed to be
Reply all
Reply to author
Forward
0 new messages