The Hidden Value of Classical Analysis in an FEA World
FEA vs. Classical Analysis: Which is better?
The short answer? It depends.
FEA can do everything classical analysis can, but not the other way around. Still, I often use classical analysis to back up FEA results. It takes more time, but it builds confidence.
The big question with FEA is always accuracy. People ask, “How do I know this is right?” There’s no absolute proof — just careful detail, good judgment, and solid documentation.
Early in my career, I ran countless check cases and compared results to published test data. Those cross-checks helped me trust both the software and my process. Even today, test data provides the best “sanity check.”
But mistakes can happen anywhere. One engineer told me about a decimal error in fuel density during the DC-8 design — a tiny slip that stalled the entire project until it was caught.
That’s why I never rely on one method alone. FEA gives depth and flexibility. Classical analysis provides clarity and simplicity. Used together, they make results stronger — and more reliable.
Norman T. Neher, P.E.
Analytical Engineering Services, Inc.
Elko New Market, MN
www.aesmn.org