Abstract: In several cases, laboratory-based modelling approaches such as
Experimental Modal Analysis and Transfer Path Analysis run into limitations
with respect to technical and economical feasibility (accessibility of the
structure, excitation feasibility, measurement time, accuracy,
…) as well as model representativity. Therefore,
approaches such as in-operation modal analysis (OMA) have been developed and
are reaching a similar degree of acceptability as standard EMA, with all
limitations regarding accuracy and observability of the structural dynamics. In
the same line of reasoning fits the question of system characterization and
identification using (or based on) other operation data types such as
transmissibility functions and coherence functions and data analysis procedures
such as principal component analysis. Using these testing and analysis
paradigms instead of the classical load-FRF-response one, key analysis
techniques such as transfer path and contribution analysis can be
reconsidered.
