A new surface-damping concept with an active-passive hybrid constraining layer (HCL) is proposed to improve the damping performance of traditional active constrained layer (ACL) systems. Instead of using a pure piezoelectric constraining layer, passive and active materials are used together to constrain the viscoelastic material layer. A generic model of the HCL treatment is presented. Nondimensional equations of motion and boundary and connecting conditions are derived. The closed-form solutions to the equations are developed and analyzed. Tabletop tests are also performed to verify the feasibility of the new damping concept. It is shown that by properly selecting a passive constraining material and assigning appropriate lengths for the active and passive constraining parts, HCL can outperform a system with a pure active PZT coversheet, both in terms of its fail-safe ability and closed-loop damping performance. [S0739-3717(00)01503-8]
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e-mail: kwwang@psu.edu
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July 2000
Technical Papers
Active-Passive Hybrid Constrained Layer for Structural Damping Augmentation
Yanning Liu, Graduate Assistant,
Yanning Liu, Graduate Assistant
Structural Dynamics and Controls Lab, Department of Mechanical and Nuclear Engineering, The Pennsylvania State University, University Park, PA 16802
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K. W. Wang, Professor of Mechanical Engineering, Fellow ASME
e-mail: kwwang@psu.edu
K. W. Wang, Professor of Mechanical Engineering, Fellow ASME
Structural Dynamics and Controls Lab, Department of Mechanical and Nuclear Engineering, The Pennsylvania State University, University Park, PA 16802
Search for other works by this author on:
Yanning Liu, Graduate Assistant
Structural Dynamics and Controls Lab, Department of Mechanical and Nuclear Engineering, The Pennsylvania State University, University Park, PA 16802
K. W. Wang, Professor of Mechanical Engineering, Fellow ASME
Structural Dynamics and Controls Lab, Department of Mechanical and Nuclear Engineering, The Pennsylvania State University, University Park, PA 16802
e-mail: kwwang@psu.edu
Contributed by the Technical Committee on Vibration and Sound for publication in the JOURNAL OF VIBRATION AND ACOUSTICS. Manuscript received Oct. 1999; revised Mar. 2000. Associate Technical Editor: J. Q. San.
J. Vib. Acoust. Jul 2000, 122(3): 254-262 (9 pages)
Published Online: March 1, 2000
Article history
Received:
October 1, 1999
Revised:
March 1, 2000
Citation
Liu, Y., and Wang, K. W. (March 1, 2000). "Active-Passive Hybrid Constrained Layer for Structural Damping Augmentation ." ASME. J. Vib. Acoust. July 2000; 122(3): 254–262. https://doi.org/10.1115/1.1303821
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