Journal ArticleDOI
Some design considerations for active and passive constrained layer damping treatments
Reads0
Chats0
TLDR
In this paper, the authors compared the performance of active constrained layer damping with passive and active damping for low-gain applications, and showed that the active constrained-layer damping treatment provided better vibration suppression than passive damping treatments.Abstract:
Active constrained layer damping treatments promise to be an effective means of vibration suppression in structures. Basically, the concept consists in either replacing or augmenting the constraining layer of a constrained viscoelastic material with piezoceramic actuators in an attempt to improve vibration suppression properties by capitalizing on both passive and active damping techniques. An important issue in such configurations is the concept that the actuation ability of the piezoceramic is reduced by the viscoelastic layer, rather than enhanced. On the other hand, an active constraining layer increases the shear in the viscoelastic and thus forms an effective means of enhancing the damping mechanism. Some design considerations for pure passive, pure active control, and active constrained layer damping are discussed here. Several authors have reported comparisons and formulations of active constrained layer damping techniques. The approach presented here differs in that it employs an energy principle for the equations of a beam with partial active/passive constrained layer damping treatments. To simulate a realistic design problem, the optimal sizing, length, and thickness of treatments subject to a total thickness restriction is studied for cases of active constrained layer, passive constrained layer, and pure active control. The results show that the active constrained layer damping treatment provides better vibration suppression than passive damping treatments, and it even out-performs pure active control for low-gain applications.read more
Citations
More filters
Journal ArticleDOI
Hybrid Active-Passive Damping Treatments Using Viscoelastic and Piezoelectric Materials: Review and Assessment
TL;DR: In this article, a review of the open literature concerning geometric configurations, modeling approaches and control algorithms for hybrid active (piezoelectric)-passive (viscoelastic) damping treatments of beams is provided.
Journal ArticleDOI
Piezoelectric actuation mechanisms for intelligent sandwich structures
TL;DR: In this article, the authors compared the performance of the shear actuation mechanism and the extension mechanism with the help of an adaptive sandwich beam finite element, with either active surface layers or active core.
Journal ArticleDOI
Advances in Hybrid Active-Passive Vibration and Noise Control Via Piezoelectric and Viscoelastic Constrained Layer Treatments:
TL;DR: In this article, a survey of hybrid active-passive vibration control is presented, illustrated with figures and tables for helpful use by resea cational experts and used for comparison.
Journal ArticleDOI
Vibration Control through Passive Constrained Layer Damping and Active Control
TL;DR: In this article, the treatment of a beam with a separate active and passive constrained layer damping (ACLD) element was investigated, and two new hybrid variations of ACLD were introduced.
Book
Smart Structures Theory
Inderjit Chopra,Jayant Sirohi +1 more
TL;DR: In this article, the authors focus on smart materials, structures and systems, which are also referred to as intelligent, adaptive, active, sensory and metamorphic, and the purpose of these materials from the perspective of smart systems is their ability to minimize life-cycle cost and/or expand the performance envelope.
References
More filters
Journal ArticleDOI
A Self-Sensing Piezoelectric Actuator for Collocated Control:
TL;DR: In this paper, a technique has been developed which allows a single piece of piezoelec tric material to concurrently sense and actuate in a closed-loop system.
Journal ArticleDOI
The forced vibration of a three-layer, damped sandwich beam with arbitrary boundary conditions
D.J. Mead,Š. Markuš +1 more
TL;DR: In this article, the transverse displacement of a three-layer sandwich beam with a viscoelastic core is derived in terms of the transversal displacement, w, for a 3D beam.
Journal ArticleDOI
Theory of Vibratory Bending for Elastic and Viscoelastic Layered Finite-Length Beams
Journal ArticleDOI
Frequency and Loss Factors of Sandwich Beams under Various Boundary Conditions
TL;DR: In this article, a complete set of equations of motion and boundary conditions governing the vibration of sandwich beams are derived by using the energy approach, and they are solved exactly for important boundary conditions.
Journal ArticleDOI
Governing Equations for Vibrating Constrained-Layer Damping Sandwich Plates and Beams
M. J. Yan,Earl H. Dowell +1 more
TL;DR: In this article, a simple differential equation is derived to describe constrained-layer damping in nonsymmetric sandwich plates and beams composed of isotropic and homogeneous layers, and the natural boundary conditions related to this equation are determined.
Related Papers (5)
The forced vibration of a three-layer, damped sandwich beam with arbitrary boundary conditions
D.J. Mead,Š. Markuš +1 more