How to Apply Nodal Velocities from a Text File to Abaqus for Acoustic Analysis

PS 2024-10-24

I have conducted a multibody simulation of a gearbox casing in Simpack, and I’ve exported the results as a text file. This file contains the real and imaginary components of normal velocity at each node for frequencies ranging from 50 Hz to 200 Hz.

In Abaqus, I’ve created an Acoustic Mesh where the material is air. My goal is to apply these nodal velocities (from the Simpack results) to the nodes at the base of the Acoustic Mesh and then perform an acoustic analysis to calculate the sound pressure around the gearbox.

Here's what I have so far:

I've used Python (pandas) to read the text file and convert the velocity data into NumPy arrays—one for each frequency, containing the normal velocity at each node.
Now, I need to apply these velocities as boundary conditions in Abaqus for each frequency.

My question is:

How can I apply these nodal velocities to Abaqus using Python?
Is there a specific section in the Abaqus manual that covers this?
Any guidance on how to set this up, would be greatly appreciated.

Thank you in advance for your help!