Transient Analysis of Ring-Stiffened Composite Cylindrical Shells With Both Edges Clamped

Kim, Y.-W.; Lee, Y.-S.

doi:10.1006/jsvi.2001.4020

Cited by 25 publications

(7 citation statements)

References 16 publications

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“…By substituting (8) in equations (4) and (6), a system of ordinary differential equations in the s-coordinate for the m th circumferential mode can be expressed as follows: with A m is a 10x10 matrix (11)…”

Section: State Vector Of Solutionmentioning

confidence: 99%

“…Recently, the vibration of laminated cylindrical shells with ring stiffeners also has been investigated. Kim and Lee [8] used a theoretical method to examine the effects of ring stiffeners on vibration characteristics and transient responses of the ring-stiffened composite cylindrical shells which subjected to the step pulse loading. The Love's thin shell theory was combined with the discrete stiffener theory to consider the effect of ring stiffeners.…”

Section: Introductionmentioning

confidence: 99%

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Continuous Element Formulations for Composite Ring-Stiffened Cylindrical Shells

Le¹,

Nguyen²,

Tran³

2018

JST

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Abstract. This article studies the free vibration of composite ring-stiffened cylindrical shells by the continuous element method (CEM). The dynamic stiffness matrix (DSM) of the studied structure has been constructed based on the analytical solutions of the governing equations of motion for composite cylindrical shells and annular plates. By applying the assembly procedure of the continuous elements method, natural frequencies and harmonic responses of composite ring-stiffened cylindrical shells are determined. In addition, the proposed model allows to exactly extract ring-stiffener vibration modes. Numerical examples confirm advantages of the proposed model: high precision solution even in medium and high frequencies, saving in calculating time and volume of data storage.

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Section: State Vector Of Solutionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Continuous Element Formulations for Composite Ring-Stiffened Cylindrical Shells

Le¹,

Nguyen²,

Tran³

2018

JST

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“…Wang and Lin (2006) studied the dynamic responses of the symmetric cross-ply ring stiffened laminated cylindrical shell by using the modal analysis method. Kim and Lee (2002) employed the Rayleigh-Ritz method and double Fourier series expansion to investigate the transient responses for the ring-stiffened composite cylindrical shells under the step pulse loading. Although the modal analysis method can be effectively used to study the transient responses of the stiffened cylindrical shells, it is difficult to be used to compute the high frequency components which are very important to the early short time transient responses.…”

Section: Introductionmentioning

confidence: 99%

Transient wave propagation in the ring stiffened laminated composite cylindrical shells using the method of reverberation ray matrix

Liu

Chen

et al. 2013

The Journal of the Acoustical Society of America

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The method of reverberation ray matrix is extended to investigate the transient wave propagation and early short time transient responses of the ring stiffened laminated composite cylindrical shells subjected to impact loads. The ring stiffened laminated cylindrical shells are modeled as the continuous coupling systems between the vibration of the un-stiffened laminated cylindrical shell and the motion of the curved beams. The dynamic models of the laminated cylindrical shell and curved beams in the Laplace phase space are established on the basis of the first order shear deformation theory. The reverberation ray matrix can be determined by the boundary and continuous conditions of the ring stiffened laminated cylindrical shell. Using the fast Fourier transform algorithm, the dynamic responses of the ring stiffened laminated cylindrical shells can be computed. Through the numerical simulations, it can be seen that the early short time transient accelerations of the ring stiffened laminated cylindrical shells under impact loads are very large, while the early short time transient shear strains and displacements are very small. Furthermore, the influences of the ring stiffener number and impact load types on the early short time transient responses of the ring stiffened laminated cylindrical shells are also investigated.

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“…Their vibration is solved in Zhang et al [2003]; Xu [2003]; Pellicano and Amabili [2003]. Likewise, in Kim and Lee [2002], , the dynamic behavior of anisotropic and composite shells is solved.…”

Section: Introductionmentioning

confidence: 99%

Neurofuzzy Modeling of Natural Frequencies of Cylindrical Shells Applied to Evolutionary Based Optimal Design of Sr Motors

Rouhani

Bahrami

Araabi

et al. 2006

Int. J. Comput. Methods

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A thorough analysis of cylindrical shells' dynamical behavior is essential in many different industrial design problems, and particularly in electric motor design. Shell vibration equations form a set of partial differential equations of order eight, where their closed form solution is only known for few special cases with a few known boundary conditions along with many not necessarily realistic assumptions. On the other hand, finite element based numerical solutions does not yield a lumped model that can be regarded as a general solution for natural frequencies of cylindrical shells.In this paper, a neurofuzzy model for natural frequencies of cylindrical shells is developed. At first, natural frequencies are calculated for a wide range of cylindrical shells' dimensions, using either closed form solution or finite element method. Gathered data is exploited for training of a Locally Linear Neurofuzzy Network, which yields a general model for calculation of natural frequencies of cylindrical shells. While the developed neurofuzzy model may be used in different design problems that deals with cylindrical shells, as a case study, the proposed model along with an evolutionary algorithm are utilized in the optimal design of a Switched Reluctance motor.

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Transient Analysis of Ring-Stiffened Composite Cylindrical Shells With Both Edges Clamped

Cited by 25 publications

References 16 publications

Continuous Element Formulations for Composite Ring-Stiffened Cylindrical Shells

Continuous Element Formulations for Composite Ring-Stiffened Cylindrical Shells

Transient wave propagation in the ring stiffened laminated composite cylindrical shells using the method of reverberation ray matrix

Neurofuzzy Modeling of Natural Frequencies of Cylindrical Shells Applied to Evolutionary Based Optimal Design of Sr Motors

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