如何用Abapy提取odb文件中应变数据及其对应坐标？

Great question! To get the coordinates tied to those strain values, you just need to use the node (or element) label linked to each field output entry, then pull the corresponding coordinates from your model's assembly. Here's a step-by-step breakdown:

First, capture the specific strain value object to avoid repeating that long path:

# Store the strain value you're targeting
strain_entry = odb.steps[stepname].frames[-1].fieldOutputs['LE'].values[1]

For Nodal Strain (most common for LE outputs) #

LE strain is typically calculated at nodes, so we can fetch the node's coordinates directly:

# Verify this is a nodal output (should be true for LE)
if strain_entry.type == NODAL:
    # Get the label of the node associated with this strain
    node_id = strain_entry.nodeLabel
    # Fetch the node from your assembly instance (replace 'YOUR_INSTANCE_NAME' with your actual instance, e.g., 'PART-1-1')
    target_node = odb.rootAssembly.instances['YOUR_INSTANCE_NAME'].nodes[node_id]
    # Extract the x/y/z coordinates (returns a tuple like (x_val, y_val, z_val))
    node_coords = target_node.coordinates
    
    # Now you can pair the strains with their coordinates
    print(f"Coordinates: {node_coords}")
    print(f"LE11: {strain_entry.data[0]}, LE22: {strain_entry.data[1]}")

For Element-Based Strain (if you requested element-averaged data) #

If your LE output is element-based (less common, but possible if you specified element averaging), you can get the element's centroid or its node coordinates:

elif strain_entry.type == ELEMENT:
    element_id = strain_entry.elementLabel
    target_element = odb.rootAssembly.instances['YOUR_INSTANCE_NAME'].elements[element_id]
    
    # Option 1: Get the element's centroid coordinates
    centroid_coords = target_element.getCentroid()
    print(f"Element centroid coordinates: {centroid_coords}")
    
    # Option 2: Get coordinates of a specific node in the element (e.g., the first node)
    first_node_coords = target_element.nodes[0].coordinates
    print(f"Element's first node coordinates: {first_node_coords}")

A quick tip: If you're processing multiple strain values, loop through the .values list and reuse the instance lookup to keep your code efficient.

内容的提问来源于stack exchange，提问作者Theodoor