Experimental Modal Analysis (EMA, OMA, ODS)

Experimental Modal Analysis (EMA, OMA, ODS)

Experimental Modal Analysis (EMA) is an effective instrument for describing, understanding and modelling the dynamic behaviour of a structure.
It can be carried out to determine the natural frequencies and mode shapes of a structure and to verify accuracy and calibrate a finite element model (FE).

Moreover, Experimental Modal Analysis, can be used in order to make a troubleshooting vibration problem.

An example of the analysis techniques that SINT Technology can use are:

Impulse excitation (instrumented hammer)
Controlled excitation (shaker)
Operational Modal Analysis (OMA)
Operational Deflection Shape (ODS)

How to describe the dynamic behaviour of a structure and measure modal data

SINT Technology can determine the main modal parameters:

Natural frequencies
Mode shapes
Damping

The validation of the modes was done using the following:

Modal Assurance Criterion (MAC)
Complexity tools
Modal Phase Collinearity (MPC)
Mean Phase Deviation (MPD)
Phase scatter

Brochure

How to validate modal data

Thanks to the best specialized software, SINT can carry out the PRE-TEST analysis (in order to choose the best set-up measurement) and the CORRELATION analysis (for the comparison of the Finite element model with the experimental model).

Experimental Modal Analysis: Data Acquisition Systems

SINT Technology uses multichannel data acquisition system up to 100 channels

SIEMENS LMS SCADAS SR02
SIEMENS LMS SCADAS SR05
SIEMENS LMS SCADAS SR09

NOTE: Available also for the installation for hazardous area