In:
The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 103, No. 5_Supplement ( 1998-05-01), p. 3055-3055
Kurzfassung:
In finite structures, the total wave field is composed of the direct wave, the first reflections as well as multiple, higher-order reflections. When the structural damping is significant and the divergence of the wave is considered, it is reasonable to assume that those waves reflected more than once only contribute marginally to the total field, and thus can be ignored to a first approximation. This suggests a simple description of the field which takes the direct wave and the first reflections into account. The semi-infinite system realizes an example of such models. The question addressed herein is the performance of those simple descriptions. This contribution first presents an investigation of the performance for one-dimensional systems. It is shown that the corresponding semi-infinite system can be used to: (1) predict the nodal lines in the spatial domain and the locations of deep troughs in the frequency domain; (2) obtain accurate motion transmissibilities. Second, the extrapolation to two-dimensional systems is presented, accompanied by results for platelike structures.
Materialart:
Online-Ressource
ISSN:
0001-4966
,
1520-8524
Sprache:
Englisch
Verlag:
Acoustical Society of America (ASA)
Publikationsdatum:
1998
ZDB Id:
1461063-2
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