OVERVIEW
Motivation
- Accurate Finite Element Analysis (FEA) predictions of component response requires testing with a controlled boundary condition
- Constrained modal testing is often desired on spacecraft programs
- Many aerospace programs are subject to strict, practical budgetary and timeline constraints
- Creating a quasi-constrained boundary is often impractical depending on test item mass
- Common solution is to model flexible parts of fixture, but this approach can have drawbacks
Objective
- Quantify expected uncertainty margins on estimated constrained modes when using a Modal Substructuring Constraint (MSC) on realistic aerospace hardware
- Identify post processing procedures that improve confidence in predicted constrained frequencies