Multiple-Input Random Vibration Best Practices
Best practices for multi-input random vibration analysis — correlation assessment, cross-spectral definition and response combination.
Best practices
- Assess correlation between inputs — measure coherence if possible
- For multi-support on same structure: assume correlated at low frequency
- For independent sources: SRSS is valid
- For correlated inputs: use full cross-spectral analysis
- Check phase at critical frequencies — constructive vs destructive
- Document the correlation assessment and analysis approach