Create a Python result to plot the node ID

Pernelle Marone-Hitz

Do we have an example of Python result to create a new field, assign the node ids to each node and plot this back to the Mechanical model ?

Pernelle Marone-Hitz

The below script can be used. The trick is to use the forward_field() method to send the field to an operator to be able to plot it.

def post_started(sender, analysis):# Do not edit this line
    define_dpf_workflow(analysis)
 
 
def define_dpf_workflow(analysis):
 
    import mech_dpf
    import Ans.DataProcessing as dpf
    mech_dpf.setExtAPI(ExtAPI)
    dataSource = dpf.DataSources(analysis.ResultFileName)
    
    # Read mesh in results file
    mesh_op = dpf.operators.mesh.mesh_provider() # operator instanciation
    mesh_op.inputs.data_sources.Connect(dataSource)
    mesh = mesh_op.outputs.mesh.GetData()
    
    # retrieve displacement
    uZ = dpf.operators.result.displacement_Z()
    uZ.inputs.data_sources.Connect(dataSource)
    nIds = uZ.outputs.fields_container.GetData()[0].ScopingIds
    data = uZ.outputs.fields_container.GetData()[0].Data
    
    # create new field and assign values
    my_field = dpf.FieldsFactory.CreateScalarField(numEntities=0, location='Nodal')
    my_field.MeshedRegionSupport = mesh
    
    for i in nIds:
        my_field.Add(i,[float(i)])
    my_field.ScopingIds = nIds
    #my_field.Data = [0.05 for i in range(0,len(data))]
    
    # forward field to an operator to plot it
    forward = dpf.operators.utility.forward_field()
    forward.inputs.field.Connect(my_field)
 
    dpf_workflow = dpf.Workflow()
    dpf_workflow.Add(forward)
    dpf_workflow.SetOutputContour(forward,dpf.enums.GFXContourType.FENodalScoping)
    dpf_workflow.Record('wf_id', False)
    this.WorkflowId = dpf_workflow.GetRecordedId()

Kev

Hey @Pernelle Marone-Hitz how can I use values from user defined plots in python result plot ? mainly for calculations such as sqrt(SXY^2 + SXZ^2) for example?

My end result is to have a certain calculation using stress tensor values (SX,SY,SXY,...) performed on a path (Weld Path). But I need to get the SX,SY.... values form preferably predefined "user defined result plots" which take into account the element orientations as the direction of the stresses need to be aligned to the weld !!

Pernelle Marone-Hitz

Hi @Kev , please have a look at this post: https://discuss.ansys.com/discussion/2080/convert-plotdata-of-user-defined-result-to-a-dpf-field-and-plot-it#latest But if what you need is the stress tensor values, you don't need to create a user-defined result, these can be obtained directly in DPF.