Experimental modal analysis
Modal analysis consists of studying the elementary deformation characteristics of a mechanical structure and modal parameters according to different boundary conditions.
Modal analysis on systems
- Controlled excitation: Impact hammer, shakers, piezoelectric excitations, sound sources
- Answer: Tri-axial accelerometers (96 simultaneous channels), or 3D scanning laser vibration meter.
The CEVAA is able to predict the in-service vibration behavior of a mechanical structure under artificial or real stress. Modal analysis also makes it possible to determine the structural characteristics (natural frequencies, modal deformations, damping) and to readjust finite element calculation models.
- Visualize the eigenmodes of the structures and readjust the finite element models
- Characterize the dynamic behavior of mechanical structures, equipment and materials
- Identify resonance phenomena that could damage the mechanical structure
- Predict the vibration behavior of a system to identify critical areas
Modal analysis tools
- Dedicated LMS TestLab software
- Excitation by vibrating pots or piezoelectric cells
- Mesh by 3D digitizer (geometry)
- FRF measurements by 3D Scanning Laser Vibrometry or 3D accelerometers
- Modal analysis on bare automobile body
- Satellite engines and elements
- Brake calipers
- Bearing cages for aeronautics
- Transmission shaft (generator)
- Plastic bottle production machine
Modal analysis of a bare automobile body in free-free condition using accelerometers and an impact hammer
Modal analysis of a tire on rim in embedded condition on marble with accelerometers and an impact hammer
For more information, contact us to discuss technically on your needs!