How to extract deflection values for each bar in Robot using Dynamo?

Robot Structural Analysis
, ,
1

Hello,

I have a structural model created in Autodesk Robot Structural Analysis and I’m using Dynamo to automate some checks.

My question is simple:
How can I extract the deflection (vertical displacement) for each bar automatically?

I need to loop through all bars in the Robot model and get their deflection values. Eu já tentei usar com o Python script, mas ele retorna zero. Veja o código abaixo

Any guidance or examples would help a lot.
Thanks!

import clr
import System

# Conecta ao Robot aberto
robot = System.Activator.CreateInstance(
    System.Type.GetTypeFromProgID("Robot.Application")
)

project = robot.Project
structure = project.Structure
bars = structure.Bars
nodes = structure.Nodes
displacements = structure.Results.Bars.Displacements

total_barras = bars.GetAll().Count

vigas = []

CASO_CARGA = 1
POSICAO = 0.5  # meio do vão

for i in range(1, total_barras + 1):
    bar = bars.Get(i)

    n1 = nodes.Get(bar.StartNode)
    n2 = nodes.Get(bar.EndNode)

    dx = abs(n2.X - n1.X)
    dy = abs(n2.Y - n1.Y)
    dz = abs(n2.Z - n1.Z)

    # critério geométrico
    if dz <= (dx + dy):

        uz = displacements.Value(
            i,
            CASO_CARGA,
            POSICAO
        ).UZ

        vigas.append({
            "Tipo": "VIGA",
            "ID_Barra": i,
            "Comprimento": bar.Length,
            "Deflexao_UZ": round(uz, 4)
        })

OUT = vigas