Modal Testing & ODS
Course Overview
This course explains how modal testing and Operating Deflection Shape analysis are used to investigate structural vibration and resonance. Participants learn the difference between a structure’s inherent dynamic properties and its actual movement while the machine is operating.
The course covers measurement planning, impact testing, phase-based operating measurements, data validation, and interpretation of mode shapes and operating deflection patterns. Applications include machinery skids, foundations, piping systems, casings, support structures, and rotating equipment components.
Key Learning Objectives
Participants will learn how to:
- Understand natural frequencies, mode shapes, and damping
- Plan and perform impact and modal tests
- Measure Frequency Response Functions
- Evaluate coherence and data quality
- Develop an ODS measurement strategy
- Distinguish resonance from forced vibration
- Recommend structural corrective actions
Course Content
- Fundamentals of structural dynamics
- Natural frequency, mode shape, and damping
- Single- and multi-degree-of-freedom systems
- Resonance and dynamic amplification
- Modal testing versus ODS analysis
- Impact hammer and shaker excitation
- Accelerometers and force transducers
- Measurement-grid and test-point selection
- Frequency Response Functions
- Coherence, averaging, and windowing
- Roving-hammer and roving-sensor methods
- Experimental modal analysis principles
- Phase-referenced operating measurements
- ODS animation and interpretation
- Structural, piping, skid, and foundation applications
- Correlation with FEM modal analysis
- Structural modification and resonance correction
- Practical industrial case studies
Who Should Attend?
Vibration analysts, structural and mechanical engineers, rotating equipment specialists, test engineers, reliability professionals, and personnel involved in structural vibration troubleshooting.