Vibration and damping analysis of fluid filled orthotropic cylindrical shells with constrained viscoelastic damping
TL;DR: In this article, the authors developed a finite element code based on the displacement field proposed by Wilkins et al. to find out the natural frequencies and loss factors of fluid filled cylindrical shells with a constrained viscoelastic layer in between two facings made of composite material.
About: This article is published in Computers & Structures.The article was published on 1999-02-01. It has received 43 citations till now. The article focuses on the topics: Added mass & Displacement field.
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TL;DR: In this paper, the authors considered a flow of hot fluid having a harmonic component superposed on the mean flow velocity is considered flowing through an insulated cylindrical shell, and the results of the theoretical studies were presented related to instability regions due to a pulsatile flow of a hot fluid through a cylinder shell and the effect of fluid temperature and excitation parameter on the behavior of dynamic instability of the system is examined.
17 citations
TL;DR: In this article, a novel matrix method is further developed for a liquid-filled circular cylindrical shell with partially constrained layer damping (CLD), which consists of treating liquid domain with Bessel function approach, and shell domain with transfer matrix equation based on a new set of first order matrix differential equation.
15 citations
TL;DR: In this article, the authors proposed a method for analyzing cylindrical shells with viscoelastic treatment, which obviates the discretisation of liquid domain by treating fluid domain with Bessel function and shell domain based on first-order shear deformation theory.
15 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
TL;DR: In this article, the modal strain energy method is used to study the energy dissipation pattern in vibrating cylindrical shells with a viscoelastic damping layer, for various circumferential and axial modes.
13 citations
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TL;DR: In this paper, a theory for the determination of the free vibration characteristics of vertical, thin, circular cylindrical shells, partially or completely filled with stationary liquid, is presented for determining whether a shell may be uniform or non-uniform.
83 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
TL;DR: In this article, an analysis of axisymmetric and unsymmetric free vibrations of conical or cylindrical shells with various boundary conditions is presented, where Love's first-approximation shell theory, with transverse shear strain added, was used and solutions were obtained by Galerkin's method.
78 citations
TL;DR: In this paper, the vibration and damping analysis of orthotropic cylindrical shells with a constrained viscoelastic core is carried out by using a finite element based on a discrete layer theory.
53 citations