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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

Agnes, G., and Napolitano, K., 1993, “Active Constrained Layer Viscoelastic Damping,” Proceedings 34th SDM Conference, pp. 3499–3506.
Baz, A., 1993, “Active Constrained Layer Damping,” Proceedings of Damping 93, San Francisco, CA., Vol. 3, pp. IBB 1–23.
Shen, I. Y., 1993, “Intelligent Constrained Layer: An Innovative Approach,” Intelligent Structures, Materials, and Vibrations, ASME, DE-Vol. 58, pp. 75–82.
Huang,  S. C., Inman,  D. J., and Austin,  E. M., 1996, “Some Design Considerations for Active and Passive Constrained Layer Damping Treatments,” Smart Mater. Struct., 5, pp. 301–313.
Liao,  W. H., and Wang,  K. W., 1997, “On the Analysis of Viscoelastic Materials for Active Constrained Layer Damping Treatments,” J. Sound Vib., 207, pp. 319–334.
Liao,  W. H., and Wang,  K. W., 1997, “On the Active-Passive Hybrid Control Actions of Active Constrained Layers,” ASME J. Vibr. Acoust., 119, pp. 563–572.
Liao,  W. H., and Wang,  K. W., 1996, “A New Active Constrained Layer Configuration with Enhanced Boundary Actions,” Smart Mater. Struct., 5, pp. 638–648.
Liao,  W. H., and Wang,  K. W., 1998, “Characteristics of Enhanced Active Constrained Layer Damping Treatments with Edge Elements, Part 2: System Analysis,” ASME J. Vibr. Acoust., 120, pp. 894–900.
Liu,  Y., and Wang,  K. W., 1999, “A Non-dimensional Parametric Study of Enhanced Active Constrained Layer Damping Treatments,” J. Sound Vib., 223, No. 4, pp. 611–644.
Lam, M. J., Inman, D. J., and Saunders, W. R., 1998, “Variations of Hybrid Damping,” Proceedings of SPIE on Smart Structures and Materials, Vol. 3327, pp. 32–43.
Dosch,  J. J., Inman,  D. J., and Garcia,  E., 1992, “A Self-Sensing Piezoelectric Actuator for Collocated Control,” J. Intel. Syst. Struct., 3, pp. 166–185.
Shen,  I. Y., 1997, “A Variational Formulation, a Work-Energy Relation and Damping Mechanisms of Active Constrained Layer Treatments,” ASME J. Vibr. Acoust., 119, pp. 192–199.
Baz,  A., 1997, “Optimization of Energy Dissipation Characteristics of Active Constrained Layer Damping,” Smart Mater. Struct., 6, pp. 360–368.
Plunkett,  R., and Lee,  C. T., 1970, “Length Optimization for Constrained Viscoelastic Layer Damping,” J. Acoust. Soc. Am., 48, No. 1, Part 2, 150–161.
Anderson,  E. H., and Hagood,  N. W., 1994, “Simultaneous Piezoelectric Sensing/Actuation: Analysis and Application to Controlled Structures,” J. Sound Vib., 174, No. 5, pp. 617–639.
Inman, D. J., 1994, Engineering Vibration, Prentice Hall.

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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