Vibration and damping analysis of multilayered fluid filled cylindrical shells with constrained viscoelastic damping using modal strain energy method
TL;DR: A semianalytical finite element for doubly curved, multilayered shells of revolution, based on an extension of the displacement field proposed by Wilkins et al., is proposed in this paper.
About: This article is published in Computers & Structures.The article was published on 2000-04-01. It has received 24 citations till now. The article focuses on the topics: Modal testing & Natural frequency.
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TL;DR: In this article, the effect of electric field intensity and thickness of top constrained elastic layer on the vibration and damping performance of the viscoelastic- and electrorheological-based sandwich cylindrical panel was investigated for different boundary conditions.
Abstract: Compared with viscoelastic materials, electrorheological fluids can be effectively used to suppress the vibration over a broad frequency and temperature range. In this study, vibration analysis and damping characteristics of sandwich cylindrical panel structures using semiactive electrorheological fluid treatments have been investigated for different boundary conditions. Unconstrained viscoelastic material has been used at boundary and untreated locations to seal electrorheological fluids. First, an efficient finite element method has been formulated to investigate the effect of electric field intensity and thickness of top constrained elastic layer on the vibration and damping performance of the viscoelastic- and electrorheological-based sandwich cylindrical panel. Then, a design optimization methodology has been developed to simultaneously optimize the number of unconstrained viscoelastic and constrained electrorheological fluid patches and their distributions, thickness ratios of the electrorheological...
24 citations
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..., 1993), and shell-type structures (Ramesh and Ganesan, 1994; Sainsbury and Masti, 2007; Saravanan et al., 2000)....
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...…investigated for beam-type (Baber et al., 1998; DiTaranto and Blasingame, 1967; Hao and Rao, 2005; Rao, 1977), plate-type (Araújo et al., 2009; Meunier and Shenoi, 2001; Rikards et al., 1993), and shell-type structures (Ramesh and Ganesan, 1994; Sainsbury and Masti, 2007; Saravanan et al., 2000)....
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TL;DR: In this paper, the linear three-dimensional piezoelasticity theory in conjunction with the versatile transfer matrix approach is employed to investigate the steady-state nonaxisymmetric fluid-structure-coupled vibrations of an arbitrarily thick bilaminate simply supported hollow cylinder of finite length, composed of an inner layer of orthotropic functionally graded material perfectly bonded to an outer layer of radially/axially/circumferentially polarized functionally graded piezoceramic material.
Abstract: The linear three-dimensional piezoelasticity theory in conjunction with the versatile transfer matrix approach is employed to investigate the steady-state nonaxisymmetric fluid–structure-coupled vibrations of an arbitrarily thick bilaminate simply supported hollow cylinder of finite length, composed of an inner layer of orthotropic functionally graded material perfectly bonded to an outer layer of radially/axially/circumferentially polarized functionally graded piezoceramic material. The cylinder is filled with a compressible nonviscous fluid and may be subjected to arbitrary time-harmonic on-surface mechanical drives. The analytical results are illustrated with numerical examples in which water-filled homogeneous PZT4–steel composite cylinders are driven by harmonic external concentrated or distributed radial surface loads. When the outer piezoelectric layer is operating in the receiving (sensing) mode, the frequency spectrums of the induced voltage, stress components, and on-axis acoustic pressure are c...
22 citations
Cites background from "Vibration and damping analysis of m..."
...Saravanan et al. (2000) developed a semianalytical finite element for multilayered, doubly curved shells of revolution....
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TL;DR: In this paper, a semi-analytical homogeneous asymptotic theory is applied to analyze the elastic wave energy dissipation and absorption properties of viscoelastic damping material (VDM) composite plates embedded with acoustic black hole (ABH).
16 citations
TL;DR: In this paper, the dynamic stability of the fluid-conveying in the periodically composite pipeline (FCPCP) is researched, and the FCPCP system is divided into two parts: pipeline with partial viscoelastic composite part and the conveying-fluid part.
Abstract: In this paper, the dynamic stability of the fluid-conveying in the periodically composite pipeline (FCPCP) is researched, and the FCPCP system is divided into two parts: pipeline with partial viscoelastic composite part and the conveying-fluid part. The in-plane variables of the first part are calculated by the Zig-Zag laminated shell theory, and the equilibrium equations are obtained by Hamilton's principle. Meanwhile, the equilibrium equations of the fluid part are mainly obtained by Newton's Second law. The govern equations of the FCPCP system can be determined by combining the equations obtained of the two parts, and considering the boundary conditions, and the instability of the current structure can be obtained by solve the govern equation system. The factors (Such as the thickness ratio of the pipeline, the thickness of viscoelastic damping layer and the viscoelastic composite fraction, etc.) which affected the instability of FCPCP is thoroughly examined, and validate is performed finally.
14 citations
References
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TL;DR: A review of computational models for sandwich plates and shells, predictor-corrector procedures, and the sensitivity of the sandwich response to variations in the different geometric and material parameters can be found in this article.
Abstract: The focus of this review is on the hierarchy of computational models for sandwich plates and shells, predictor-corrector procedures, and the sensitivity of the sandwich response to variations in the different geometric and material parameters. The literature reviewed is devoted to the following application areas: heat transfer problems; thermal and mechanical stresses (including boundary layer and edge stresses); free vibrations and damping; transient dynamic response; bifurcation buckling, local buckling, face-sheet wrinkling and core crimping; large deflection and postbuckling problems; effects of discontinuities (eg, cutouts and stiffeners), and geometric changes (eg, tapered thickness); damage and failure of sandwich structures; experimental studies; optimization and design studies. Over 800 relevant references are cited in this review, and another 559 references are included in a supplemental bibliography for completeness. Extensive numerical results are presented for thermally stressed sandwich panels with composite face sheets showing the effects of variation in their geometric and material parameters on the accuracy of the free vibration response, and the sensitivity coefficients predicted by eight different modeling approaches (based on two-dimensional theories). The standard of comparison is taken to be the analytic three-dimensional thermoelasticity solutions. Some future directions for research on the modeling of sandwich plates and shells are outlined.
740 citations
TL;DR: In this article, an efficient method for finite element modeling of three-layer laminates containing a viscoelastic layer is described, and modal damping ratios are estimated from undamped normal mode results by means of the modal strain energy method.
Abstract: An efficient method is described for finite element modelling of three-layer laminates containing a viscoelastic layer. Modal damping ratios are estimated from undamped normal mode results by means of the modal strain energy method. Comparisons are given between results obtained by the MSE method implemented in NASTRAN, by various exact solutions for approximate governing differential equations, and by experiment. Results are in terms of frequencies, modal damping ratios, and mechanical admittances for simple beams, plates, and rings. Application of the finite element -- MSE method in design of integrally damped structures is discussed.
542 citations
TL;DR: In this article, the authors re-examined the definition of loss factor in terms of energy quantities, particularly as it applies to composite viscoelastic systems, and proposed simple relations which express the loss factors of series-parallel arrays of massless VRSs.
Abstract: The definition of loss factor in terms of energy quantities is re‐examined, particularly as it applies to composite viscoelastic systems. A restatement of this definition in terms of a corresponding viscoelastic spring is used to show that this definition is extremely useful for massless (ideal viscoelastic spring) systems, but may be applied unambiguously to spring systems with a single attached mass only at resonance. Simple relations are presented which express the loss factors of series‐parallel arrays of massless viscoelastic springs in terms of properties of the individual components. Implications of these relations in damping of composite structures are discussed. (This work was supported in part by the Aeronautical Systems Division, U. S. Air Force.)
319 citations
TL;DR: In this paper, the effects of the shear parameter on the frequency and loss factors for various geometric properties and boundary conditions are also discussed for cylindrical shells with different core to facing thickness and length to radius ratios.
80 citations