An experimental evaluation of the benefits of smart damping materials in reducing structural noise and vibration is presented. The construction of a special test rig for measuring both vibrations and structure-borne noise is discussed. Next, the application of smart damping materials, specifically piezoceramics with electrical shunts, in reducing the vibrations of a test plate is discussed. It is shown that the smart damping materials are able to effectively reduce the vibration peaks at multiple frequencies, with minimal amount of added weight to the structure, as compared to passive viscoelastic damping materials. Further, the test results show that the structure-borne noise at the vibration peaks is substantially reduced with the smart damping materials. The results indicate the viability of smart damping materials for many industrial applications where reducing noise and vibrations is desired, with minimal amounts of added weight.

Issue Section:
Technical Briefs
Keywords:
damping, piezoceramics, piezoelectric devices, vibration control, active noise control, structural acoustics
Topics:
Damping, Noise (Sound), Vibration, Piezoelectric ceramics
1.
Agnes
,
G. S.
,
1995
, “
Development of a Model for Simultaneous Active and Passive Piezoelectric Vibration Suppression
,”
J. Intell. Mater. Syst. Struct.
,
6
, pp.
482
–
487
.
2.
Carson, A. B., 1990, Electrical Engineering: Concepts and Applications, Addison-Wesley Publishing Co, New York, pp. 172–175.
3.
Edberg, D. L., Bicos, A. S., and Fechter, J. S., 1991, “On Piezoelectric Energy Conversion for Electronic Passive Damping Enhancement,” Proceedings of Damping, San Diego, CA.
4.
Forward
,
R. L.
,
1979
, “
Electronic Damping of Vibrations in Optical Structures
,”
Appl. Opt.
,
18
, No.
5
, pp.
690
–
697
.
5.
Ghoneim
,
H.
,
1993
, “
Electromechanical Surface Damping Using Constrained Layer and Shunted Piezoelectric
,”
SPIE Proceedings: Mathematics in Smart Structures
,
1919
, pp.
78
–
89
.
6.
Hagoo
,
N. W.
,
Chung
,
W. H.
, and
von Flotow
,
A.
,
1990
, “
Modeling of Piezoelectric Actuator Dynamics for Active Structural Control
,”
J. Intell. Mater. Syst. Struct.
,
1
, pp.
327
–
354
.
7.
Hagoo
,
N. W.
, and
von Flotow
,
A.
,
1991
, “
Damping of Structural Vibrations with Piezoelectric Materials and Passive Electrical Networks
,”
J. Sound Vib.
,
146
, No.
2
, pp.
243
–
268
.
8.
Wu
,
S.
, and
Bicos
,
A. S.
,
1997
, “
Structural Vibration Damping Experiments Using Improved Piezoelectric Shunts
,”
SPIE
,
3045
, pp.
40
–
50
.
9.
Hollkamp
,
J. J.
,
1994
, “
Multimodal Passive Vibration Suppression with Piezoelectric Materials and Resonant Shunts
,”
J. Intell. Mater. Syst. Struct.
,
5
, pp.
49
–
57
.
10.
Hagood
,
N. W.
, and
von Flotow
,
A.
,
1991
, “
Damping of Structural Vibrations with Piezoelectric Materials and Passive Electrical Networks
,”
J. Sound Vib.
,
146
, No.
2
, pp.
243
–
268
.
11.
Mulcahey
,
B.
, and
Spangler
,
R. L.
,
1998
, “
Piezos Tame Tough Vibrations
,”
Mach. Des.
,
70
, No.
4
, pp.
60
–
63
.
12.
Sun
,
J. Q.
,
Norris
,
M. A.
,
Rossetti
,
D. J.
, and
Highfill
,
J. H.
,
1996
, “
Distributed Piezoelectric Actuators for Shell Interior Noise
,”
ASME J. Vibr. Acoust.
,
118
, No.
4
, pp.
676
–
681
.
13.
Jeric, K. M., 1999, “An Experimental Evaluation of the Application of Smart Damping Materials for Reducing Structural Noise and Vibrations,” Master of Science Thesis Department of Mechanical Engineering, Virginia Tech.
Copyright © 2001
 by ASME
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