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TECHNICAL PAPERS

Active-Passive Hybrid Constrained Layer for Structural Damping Augmentation

[+] Author and Article Information
Yanning Liu, K. W. Wang

Structural Dynamics and Controls Lab, Department of Mechanical and Nuclear Engineering, The Pennsylvania State University, University Park, PA 16802

J. Vib. Acoust 122(3), 254-262 (Mar 01, 2000) (9 pages) doi:10.1115/1.1303821 History: Received October 01, 1999; Revised March 01, 2000
Copyright © 2000 by ASME
Topics: Damping
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References

Figures

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One-dimensional base structure with HCL treatment
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Free-body diagram of active constraining layer
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Open-loop loss factor versus characteristic length for different constraining layer –: Treatment with an anchor (K=1000); [[dashed_line]]: Treatment without anchor (K=0)
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Open-loop loss factor ηop versus active material coverage ratio α
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Loss factors versus control gain G [[dashed_line]]: passive loss factor; [[dot_dash_line]]: active loss factor; –: hybrid loss factor
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Loss factors versus active material coverage ratio α
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Shear distribution of the closed-loop systems in the VEM layer
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Dimensionless optimal control gain G versus the active material coverage ratio α
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HCL hybrid loss factor ηs and open-loop loss factor ηop versus α for different Sp. [[dot_dash_line]]: ηop,Sp=1; [[dashed_line]]: ηop,Sp=3; [[dotted_line]]: ηop,Sp=6; –⋅⋅–⋅⋅: ηs,Sp=1; –––-: ηs,Sp=3; –: ηs,Sp=6;
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Schematics of experimental setup
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Effect of self-sensing control gain on the first modal peak response of the systems
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Impulse responses of the open loop systems
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Impulse responses of the closed-loop systems

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