Civil Engineering Reference
In-Depth Information
observed that coupling of the piezoelectric with a porous or elastic domain is natural (see
Section 13.4).
Numerical versus experimental results
Two configurations are studied: (i) active radiation and (ii) passive absorption. In the
radiation configuration, the tube is closed by a rigid plate and a 100 V is applied to the
PVDF film. Figure 13.19 presents the comparison between the measured and simulated
130
Test
FEM
120
110
100
90
80
4
2
0
−
2
−
4
100
300
500
700
900
1100
1300
1500
Frequency (Hz)
(a)
130
120
110
100
Test
FEM
90
80
4
2
0
−
2
4
−
100
300
500
700
900
1100
1300
1500
Frequency (Hz)
(b)
Figure 13.19
Acoustic pressure: (a) in the back cavity and (b) near the rigid end of the
tube for 100 V applied to the PVDF film (LeRoy 2008).
