Hi everyone,

I am trying to extract U1 displacement for SPH nodes in Abaqus using Python. My goal is to write the displacement values to a CSV file, with time in the first column and displacements for each node in the subsequent columns.

Here is my script:

# -*- coding: utf-8 -*-

import odbAccess

import csv

from odbAccess import openOdb

from abaqusConstants import NODAL, COMPONENT

# Open the Abaqus ODB file

odb_path = 'C:/Vestas Tower Damper/Set-Up-1/TLD-No-Baffle.odb'

odb = openOdb(odb_path)

node_set_name = "ALL_GENERATED_NODES_SPH"

# Get the first step in the ODB

step_name = list(odb.steps.keys())[0]

frames = odb.steps[step_name].frames

data_dict = {}

# Iterate through each frame in the step

for frame in frames:

    time = frame.frameValue

    field = frame.fieldOutputs['U']

    # Check if the node set exists

    if node_set_name in odb.rootAssembly.nodeSets:

        node_subset = odb.rootAssembly.nodeSets[node_set_name]

        u_field = field.getSubset(region=node_subset, position=NODAL)

        # Extract data from the subset

        for value in u_field.values:

            node_id = value.nodeLabel

            u1 = value.data[0]

            if node_id not in data_dict:

                data_dict[node_id] = []

            data_dict[node_id].append((time, u1))

# Write data to CSV

csv_filename = "U1_liquid.csv"

with open(csv_filename, "w", newline='') as csv_file:

    csv_writer = csv.writer(csv_file)

    header = ["Time"] + [f"Node_{node}" for node in sorted(data_dict.keys())]

    csv_writer.writerow(header)

    time_series = list(zip(*[[(t, u1) for (t, u1) in data_dict[node]] for node in sorted(data_dict.keys())]))

    for row in time_series:

        csv_writer.writerow([row[0][0]] + [u1 for _, u1 in row])

# Close the ODB file

odb.close()

print("✅ U1 data extracted successfully and saved as 'U1_liquid.csv'.")

i always get an issue with "Unexpected Indentation" -- for value in u_field.values: