Civil Engineering Reference
In-Depth Information
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20
FTMM
SEA Approach
Modal Approach
FEM
TMM
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25
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30
−
35
−
40
−
45
−
50
−
55
−
60
10
2
10
3
Frequency (HZ)
Figure 12.10
Radiated power of a plate excited by a point force.
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40
FTMM
SEA Approach
Modal Approach
FEM
−
45
−
50
−
55
−
60
−
65
−
70
10
2
10
3
Frequency (HZ)
Figure 12.11
Space averaged quadratic velocity of a plate - limp foam system excited
by a point force.
source side, computed using the three approaches presented and the FEM are illustrated
in Figures 12.11 and 12.12, respectively. Good agreement is observed between the three
approaches, and the correlation with FE calculation is good at high frequencies. The
comparison between the methods presented and the FEM is acceptable, keeping in mind
the assumptions made for the different methods and the different approaches used to
estimate the radiation efficiency.
