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
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
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