Experimental modal analysis
The 6NAPSE Group design office carries out experimental modal analysis and testing to study the deformation of a mechanical structure.
What is 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 and testing
Our design office offers to carry out modal analyzes on all systems.
- Controlled excitation: Impact hammer, shakers, piezoelectric excitations, sound sources
- Answer: Tri-axial accelerometers (96 simultaneous channels), or 3D scanning laser vibration meter.
6NAPSE Group 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.
Objectives of modal analysis
- 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
Applications
- 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
6NAPSE Group assets
- Complete validation plan (support for all tests of a standard)
- Correlation of calculations / tests / design / materials analysis
Contactez-nous pour échanger rapidement et techniquement sur votre besoin !