Semianalytical finite element analysis of active constrained layer damping in cylindrical shells of revolution
TL;DR: In this article, a three noded, isoparametric, multilayered, semianalytical finite element is developed and used for active constrained layer damping in cylindrical shells of revolution.
About: This article is published in Computers & Structures.The article was published on 2001-04-01. It has received 19 citations till now. The article focuses on the topics: Constrained-layer damping & Damping ratio.
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TL;DR: In this article, a geometrically nonlinear frequency-domain analysis of functionally graded plates integrated with an active constrained layer damping (ACLD) arrangement is performed by developing an incremental nonlinear closed-loop dynamic finite element model of the overall plate.
Abstract: A geometrically nonlinear frequency-domain analysis of functionally graded plates integrated with an active constrained layer damping (ACLD) arrangement is performed by developing an incremental nonlinear closed-loop dynamic finite element model of the overall plate. The active constraining layer is made of piezoelectric fiber reinforced composite (PFRC) and a heated substrate-plate surface is considered. The analysis is mainly for investigating the effect of temperature on the nonlinear vibration characteristics of the overall plate in the frequency domain and also, on the corresponding control authority of the PFRC constraining layer. A negative velocity feedback control strategy is utilized to achieve active damping. The temperature dependent material properties of the substrate plate are graded in the thickness direction according to a power law, and expressed in terms of the power law exponent and the constituent material (metal and ceramic) properties. Using the Golla-Hughes-McTavish method for mode...
15 citations
Cites background from "Semianalytical finite element analy..."
...However, after the proposition of the concept of ACLD treatment, extensive research on its performance for controlling the vibration of structures has been carried out and reported in the literature (Baz and Ro, 1995; Rongong et al., 1997; Ray and Baz, 1999; Park and Baz, 1999; Sarvanan et al., 2001; Chantalakhana and Stanway, 2001)....
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...…concept of ACLD treatment, extensive research on its performance for controlling the vibration of structures has been carried out and reported in the literature (Baz and Ro, 1995; Rongong et al., 1997; Ray and Baz, 1999; Park and Baz, 1999; Sarvanan et al., 2001; Chantalakhana and Stanway, 2001)....
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TL;DR: In this article, the active vibration control of laminated cylindrical panels with arbitrary edge condition is investigated using piezoelectric fiber reinforced composite (PFRC) material.
Abstract: Active vibration control of laminated cylindrical panels with arbitrary edge condition is investigated using piezoelectric fiber reinforced composite (PFRC) material. The boundary cases considered are free edge, simply supported edge and clamped edge for thin panels. Adopting a velocity feedback control strategy the transient response of cylindrical panels can be suppressed efficiently, and the relationship between the control gain and active damping ratio has been investigated. The active damping ratio curves are numerically calculated, and from the simulation results it is also found that the piezoelectric fiber orientation of the PFRC patches plays an important role in the vibration suppression capability.
15 citations
Cites methods from "Semianalytical finite element analy..."
...Saravanan et al. (2001) studied ACLD in cylindrical shells of revolution using a three noded, isoparametric, multilayered, semianalytical finite element model, and compared the ACLD with the PCLD treatments for the class of shells considered....
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TL;DR: In this paper, the smart constrained layer damping (SCLD) treatment of laminated composite shells with variable thickness undergoing geometrically nonlinear vibrations has been investigated.
Abstract: This paper is concerned with the smart constrained layer damping (SCLD) treatment of laminated composite shells with variable thickness undergoing geometrically nonlinear vibrations. Three dimensional fractional derivative model (FDM) has been implemented for modelling the constrained viscoelastic layer of the SCLD treatment. The constraining layer of the SCLD treatment is made of vertically/obliquely reinforced 1–3 piezoelectric composites (PZCs) and acts as the distributed actuator. The strain-displacement relations are based on the simplified Novozhilov nonlinear shell theory to introduce the geometric nonlinearity in the large amplitude vibrations of the variable thickness shells. A three dimensional smart nonlinear finite element (FE) model has been developed for carrying out this analysis. Several numerical results are presented to check the accuracy of the present three-dimensional FDM for analyzing the passive and active control authority of the SCLD patch. Also the efficacy of the activated SCLD patch in controlling geometrically nonlinear vibration is computed for variable thickness shells and compared with shells of constant thickness.
14 citations
TL;DR: In this article, a bibliography is given containing 2214 references published during 2001 on piezoelectric and pyroelectric properties of materials and their applications, including journal articles, patents and applications.
Abstract: A bibliography is given containing 2214 references published during 2001 on piezoelectric and pyroelectric properties of materials and their applications. It includes journal articles, patents and ...
11 citations
TL;DR: In this paper, a new model for a smart shell of revolution treated with active constrained layer damping (ACLD) is developed, and the damping effects of the ACLD treatment are discussed.
10 citations
References
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TL;DR: Piezoelectric crystals and their application to ultrasonics were discussed in this paper, where the authors proposed a method for the extraction of the ultrasonic properties of these crystals.
Abstract: Piezoelectric crystals and their application to ultrasonics , Piezoelectric crystals and their application to ultrasonics , دانشگاه تهران
1,057 citations
TL;DR: In this paper, a finite element formulation which includes the piezoelectric or electroelastic effect is given, a strong analogy is exhibited between electric and elastic variables, and a stiffness finite element method is deduced.
Abstract: A finite element formulation which includes the piezoelectric or electroelastic effect is given. A strong analogy is exhibited between electric and elastic variables, and a ‘stiffness’ finite element method is deduced. The dynamical matrix equation of electroelasticity is formulated and found to be reducible in form to the well-known equation of structural dynamics, A tetrahedral finite element is presented, implementing the theorem for application to problems of three-dimensional electroelasticity.
972 citations
TL;DR: In this article, a hybrid damping design that integrates active and passive dampings through intelligent constrained layer (ICL) treatments is proposed, which consists of a viscoelastic shear layer sandwiched between a piezoelectric constraining cover sheet and the structure to be damped.
Abstract: This paper is to propose a viable hybrid damping design that integrates active and passive dampings through intelligent constrained layer (ICL) treatments. This design consists of a viscoelastic shear layer sandwiched between a piezoelectric constraining cover sheet and the structure to be damped. According to measured vibration response of the structure, a feedback controller regulates axial deformation of the piezoelectric layer to perform active vibration control. In the meantime, the viscoelastic shear layer provides additional passive damping. The active damping component of this design will produce adjustable and significant damping. The passive damping component of this design will increase gain and phase margins, eliminate spillover, reduce power consumption, improve robustness and reliability of the system, and reduce vibration response at high frequency ranges where active damping is difficult to implement. To model the dynamics of ICL, an eighth-order matrix differential equation governing bending and axial vibrations of an elastic beam with the ICL treatment is derived. The observability, controllability, and stability of ICL are discussed qualitatively for several beam structures. ICL may render the system uncontrollable or unobservable or both depending on the boundary conditions of the system. Finally, two examples are illustrated in this paper. The first example illustrates how an ICL damping treatment, which consists of an idealized, distributed sensor and a proportional-plus-derivative feedback controller, can reduce bending vibration of a semi-infinite elastic beam subjected to harmonic excitations. The second example is to apply an ICL damping treatment to a cantilever beam subjected to combined axial and bending vibrations. Numerical results show that ICL will produce significant damping.
172 citations
TL;DR: In this paper, a finite element model is developed to analyze the dynamics and control of flat plates which are partially treated with multi-patches of active constrained layer damping (ACLD) treatments.
Abstract: Bending vibration of flat plates is controlled using patches of active constrained layer damping (ACLD) treatments. Each ACLD patch consists of a visco-elastic damping layer which is sandwiched between two piezo-electric layers. The first layer is directly bonded to the plate to sense its vibration and the second layer acts as an actuator to actively control the shear deformation of the visco-elastic damping layer according to the plate response. With such active/passive control capabilities the energy dissipation mechanism of the visco-elastic layer is enhanced and the damping characteristics of the plate vibration is improved. A finite element model is developed to analyze the dynamics and control of flat plates which are partially treated with multi-patches of ACLD treatments. The model is validated experimentally using an aluminum plate which is 0.05 cm thick, 25.0 cm long and 12.5 cm wide. The plate is treated with two ACLD patches, each of which is made of SOUNDCOAT (Dyad 606) visco-elastic layer sandwiched between two layers of AMP/polyvinylidene fluoride (PVDF) piezo-electric films. The piezo-electric axes of the patches are set at zero degrees relative to the plate longitudinal axis to control the bending mode. The effect of the gain of a proportional control action on the system performance is presented. Comparison between the theoretical predictions and the experimental results suggest the validity of the developed finite element model. Also, comparisons with the performance of conventional passive constrained layer damping clearly demonstrate the merits of the ACLD as an effective means for suppressing the vibration of flat plates.
146 citations
TL;DR: In this paper, the design parameters and control gains of the resulting Active Constrained Layer Damping (ACLD) treatments are optimally selected, in order to maximize the modal damping ratios and minimize the total weight of the damping treatment.
Abstract: Conventional Passive Constrained Layer Damping (PCLD) treatments with viscoelastic cores are provided with built-in sensing and actuation capabilities to actively control and enhance their vibration damping characteristics. The design parameters and control gains of the resulting Active Constrained Layer Damping (ACLD) treatments are optimally selected, in this paper, for fully-treated beams using rational design procedures. The optimal thickness and shear modulus of the passive visco-elastic core are determined first to maximize the modal damping ratios and minimize the total weight of the damping treatment. The control gains of the ACLD are then selected using optimal control theory to minimize a weighted sum of the vibrational and control energies. The theoretical performance of beams treated with the optimally selected ACLD treatment is determined at different excitation frequencies and operating temperatures. Comparisons are made with the performance of beams treated with optimal PCLD treatments and untreated beams which are controlled only by conventional Active Controllers (AC). The results obtained emphasize the potential of the optimally designed ACLD as an effective means for providing broad-band attenuation capabilities over wide range or operating temperatures as compared to PCLD treatments.
141 citations