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A method for structural vibration characterization in the midfrequency regiona)
a)Portions of this work were presented in “A method for characterizing elastic structures in the midfrequency region,” Proceedings of 2004 ASME International Mechanical Engineering Congress, Anaheim, California, November 2004.
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10.1121/1.2151827
/content/asa/journal/jasa/119/2/10.1121/1.2151827
http://aip.metastore.ingenta.com/content/asa/journal/jasa/119/2/10.1121/1.2151827

Figures

Image of FIG. 1.
FIG. 1.

Structure containing vibration isolator, (a) Actual isolator, (b) low frequency lumped-parameter model, and (c) midfrequency spatial model.

Image of FIG. 2.
FIG. 2.

Structure excited under distributed forces.

Image of FIG. 3.
FIG. 3.

Simplified vibration isolator model.

Image of FIG. 4.
FIG. 4.

Simply supported beam model. (a) Upper and lower contact region over the whole beam. (b) Upper contact region over whole beam and lower contact region over half of the beam.

Image of FIG. 5.
FIG. 5.

FE model of a sheet metal part.

Image of FIG. 6.
FIG. 6.

(a) Uniformly distributed spatial force, (b) linearly varying momentlike spatial force.

Image of FIG. 7.
FIG. 7.

Basis functions over the input region (a) first, (b) second, (c) third, and output region (e) first, (f) second, and (g) third.

Image of FIG. 8.
FIG. 8.

The values of entries of as functions of Helmholtz number .

Image of FIG. 9.
FIG. 9.

The values of entries of as functions of Helmholtz number .

Image of FIG. 10.
FIG. 10.

The values of entries of as functions of Helmholtz number .

Image of FIG. 11.
FIG. 11.

The values of entries of as functions of Helmholtz number .

Image of FIG. 12.
FIG. 12.

Computed response at Node 1 using the four-plane method (—) and the direct FE method (- - -).

Tables

Generic image for table
TABLE I.

The geometry and material properties of a beam.

Generic image for table
TABLE II.

Select computed natural frequencies of the beam in Fig. 4.

Generic image for table
TABLE III.

M matrix for the 2D plate structure.

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/content/asa/journal/jasa/119/2/10.1121/1.2151827
2006-02-01
2014-04-18
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: A method for structural vibration characterization in the midfrequency regiona)
http://aip.metastore.ingenta.com/content/asa/journal/jasa/119/2/10.1121/1.2151827
10.1121/1.2151827
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