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Experimental Modal Analysis VS.
Operational Modal Analysis
by Ardalan Sabamehr, Ph.D.
Key terms
Forced Vibration Test, Ambient Vibration Test,
Ambient Vibration Tests
The dynamic properties of structures can be extracted from both forced and ambient vibrations tests. The identification of the modal parameters by EMA techniques becomes more challenging in the presence of large-scale structures with low frequency ranges...
Forced Vibration Tests &
Experimental Modal Analysis
by Ardalan Sabamehr, Ph.D.
Key terms
Forced Vibration Test, Experimental Modal Analysis,
Input-Output Modal Identification
Experiment Modal Analysis (EMA) has been the conventional modal identification technique used by civil engineering for more than six decades. This approach uses an input excitation of known force levels and frequencies, both controlled by the experimentalist...
Ambient Vibration Tests &
Operational Modal Analysis
by Ardalan Sabamehr, Ph.D.
Key terms
Ambient Vibration Test, Operational Modal Analysis, In-Operation Method, Output-Only
Nowadays, Operational Modal Analysis (OMA) has become very attractive in the field of civil engineering because the tests are cost-effective, fast and do not interfere with operations of the structure. The identified modal parameters are representative of the actual behavior of the structure under its standard conditions...
Seismic Microzonation
by Rania Bedair, Ph.D. Eng
Key terms
Risk Analysis, Soil Classification, Ambient Vibrations
Seismic microzonation is the process of subdividing a potential earthquake-prone area into zones with respect to the site’s characteristics so that seismic hazards at different locations within a given area can be correctly identified and site classification maps can be developed...
Modal Testing and Analysis
by Ardalan Sabamehr, Ph.D.
Key terms
Modal Analysis, Modal Identification, Ambient Vibration Test, Operational Modal Analysis, Vibration
As structural analysis techniques continually derive and become increasingly complicated, the limits in the structural behavior become apparent. These limits are used and are prominently prevalent in the field of structural dynamics. This technique ...
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