Experimental modal analysis

CEVAA carries out modal analysis. We study the elementary deformation characteristics of a mechanical structure and modal parameters according to different boundary conditions.

What is modal analysis?

Modal analysis is an engineering technique that studies the vibration behavior of a structure. In other words, it determines the natural frequencies at which a structure tends to vibrate, as well as the forms that these vibrations take. This information is crucial for understanding how a structure responds to external excitations, such as vibrations, shocks, or aerodynamic forces.

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.

Objectives

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