Mastering Free-Free and Constrained Modal Analysis in Abaqus using HyperMesh| Eigenvalue-Eigenvector

This video provides a comprehensive tutorial on performing modal analysis in Abaqus to extract natural frequencies and mode shapes. It walks through the complete workflow — from setting up the frequency extraction step to post-processing results in HyperView.

🔍 In this video, you will learn:
Step Configuration:
How to convert a linear static step into a frequency extraction procedure.
Solver Settings:
Why the Lanczos solver is the most commonly used method and how to enable Modern Architecture (SIM = Yes).
Normalization:
Understanding the difference between mass normalization and displacement normalization for eigenvectors.
Modal Equations:
Why external loads are ignored in modal analysis, since the governing equation does not include a force term.
Output Requests:
How to request important outputs like displacement (U), stress (S), and strain energy (SE).
Constrained vs Free-Free Analysis:
How boundary conditions affect results, including a clear explanation of the six rigid body modes (zero-frequency modes) in unconstrained structures.

Data Interpretation:
How to convert eigenvalues into frequency
and how to use participation factors to identify dominant modes.

Post-Processing:
Visualizing mode shapes, understanding relative deformation, and animating results effectively.

📥 You can download the INP file used in this tutorial from the link in the description to follow along

constrained:
https://www.dropbox.com/scl/fi/hg3eiul0ydotlyxl52got/constained_modal_analysis.inp?rlkey=wfj54inv1de2rcw1apoc54f58&st=pzsaclvh&dl=1

Free-free:
https://www.dropbox.com/scl/fi/h60begczd8l3dyo8f7cgt/FREE_Free_modal_analysis.inp?rlkey=qvyif44jwmw7krwt75reroiif&st=di6x6ul5&dl=1

Видео Mastering Free-Free and Constrained Modal Analysis in Abaqus using HyperMesh| Eigenvalue-Eigenvector канала Simulated_Engineering