418
R. Zajac et al.
Fig. 2 Measurement set up
In this technical measurement, five channels were on: force sensor, excitation
signal, two microphones, and laser vibrometer. In Fig. 2 is shown the position (e.8)—
the analyzer, it is one of the most important parts of the measuring chain. Generally, the analyzer communicates between the hardware and the software part of the
measuring apparatus. It mediates the measured signals and delivers them in digital
form to the evaluation software.
BK CONNECT software from Brüel & Kjaer mediated the whole measurement,
recording, and post-processing of the data.
3 Computational Approach
In parallel with the experiment, a computational model was created in FEM-based
software. In the software environment, a CAD model with validated dimensions was
initially created. In the calculations, the material properties of the given structure
were considered, which were partially modified in the initial phase by comparing the
modal shapes from the measurement, measuring of dimensions, and mass. Further,
the computational modal analysis was followed by a harmonic analysis in the structural and acoustic domains. The numerical models were created based on boundary
conditions considered from a technical experiment [4].
R. Zajac et al.
Fig. 2 Measurement set up
In this technical measurement, five channels were on: force sensor, excitation
signal, two microphones, and laser vibrometer. In Fig. 2 is shown the position (e.8)—
the analyzer, it is one of the most important parts of the measuring chain. Generally, the analyzer communicates between the hardware and the software part of the
measuring apparatus. It mediates the measured signals and delivers them in digital
form to the evaluation software.
BK CONNECT software from Brüel & Kjaer mediated the whole measurement,
recording, and post-processing of the data.
3 Computational Approach
In parallel with the experiment, a computational model was created in FEM-based
software. In the software environment, a CAD model with validated dimensions was
initially created. In the calculations, the material properties of the given structure
were considered, which were partially modified in the initial phase by comparing the
modal shapes from the measurement, measuring of dimensions, and mass. Further,
the computational modal analysis was followed by a harmonic analysis in the structural and acoustic domains. The numerical models were created based on boundary
conditions considered from a technical experiment [4].