Operational Modal Analysis
OMA for structural dynamics
- A bridge owner needs to establish baseline dynamic properties for scour monitoring
- A high-rise building requires modal analysis for wind load assessment
- An industrial structure needs dynamic characterization for equipment installation
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Share project details and timelines. Our engineering leads respond within one business day with mobilization options and PE-reviewed scope.
Operational modal analysis identifies the dynamic properties of structures under normal operating conditions without artificial excitation. This technique uses ambient vibrations from wind, traffic, or machinery to determine natural frequencies, damping ratios, and mode shapes that characterize structural behavior. We deploy nationwide across bridges, buildings, and industrial facilities, providing data that validates design assumptions and detects changes indicating damage or deterioration. Our systems use advanced signal processing to extract modal parameters from operational data, creating baseline signatures for long-term monitoring. Results support finite element model calibration, fatigue life assessment, and condition-based maintenance decisions. We provide PE-stamped reports documenting modal properties and their implications for structural performance and safety.
What We Include
- Multi-channel accelerometer arrays for modal testing
- Advanced signal processing software for modal parameter extraction
- Ambient vibration data collection under operational conditions
- Modal parameter identification and validation
- Finite element model correlation and updating
- Baseline modal signatures for long-term monitoring
- PE-stamped analysis reports with engineering interpretation
- Damage detection algorithms based on modal changes
Common Situations We Handle
- A bridge owner needs to establish baseline dynamic properties for scour monitoring
- A high-rise building requires modal analysis for wind load assessment
- An industrial structure needs dynamic characterization for equipment installation
Frequently Asked Questions
What structures benefit from operational modal analysis?
Bridges, towers, and buildings with dynamic loading. Our nationwide deployment covers various structure types under operational conditions.
How does OMA differ from traditional modal testing?
Uses ambient vibrations instead of artificial excitation. Our nationwide experience ensures accurate results without disrupting operations.
What information does modal analysis provide?
Natural frequencies, damping, and mode shapes. Data nationwide helps validate structural models and detect damage.
How does OMA support bridge monitoring?
Identifies frequency changes from damage or scour. Our monitoring nationwide supports bridge safety and maintenance decisions.
What equipment is needed for operational modal analysis?
High-sensitivity accelerometers and signal processing software. Our nationwide deployment ensures comprehensive coverage.
Example of Our Capabilities
Service Type
Operational Modal Analysis
Scope
Dynamic characterization of structures using ambient operational vibrations
Client Situation
Structure owner needs to understand dynamic behavior for maintenance planning
Our Approach
Deploy accelerometer arrays, collect ambient vibration data, extract modal parameters
Expected Outcome
Modal analysis report, baseline signatures, and structural dynamic characterization
Contact us to discuss your operational modal analysis needs nationwide. We can share references upon request.