Coupled vibration of a partially fluid-filled cylindrical container with a cylindrical internal body

Askari, Ehsan; Daneshmand, Farhang

doi:10.1016/j.jfluidstructs.2008.07.003

Cited by 31 publications

(6 citation statements)

References 34 publications

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“…In order to compute the time-independent velocity potential, ) (s  , the fluid domain can be divided into three parts (III, IV, V) as shown in Fig. 1, (Evans and McIver, 1987;Askari and Daneshmand, 2009)…”

Section: Dynamic Behaviour Of the Fluid-structure Interactionmentioning

confidence: 99%

Sloshing in a Vertical Circular Cylindrical Container With a Vertical Baffle

Askari¹,

Daneshmand

Amabili

2010

ASME 2010 7th International Symposium on Fluid-Structure Interactions, Flow-Sound Interactions, and Flow-Induced Vibration and

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The linear problem of liquid sloshing in a cylindrical container with a vertical baffle is considered in the present paper. In this study, a theoretical oriented approach is developed for calculating the natural frequencies of liquid. The baffle is a thin-walled and open-ended cylindrical shell that is concentrically placed and partially submerged inside the container. The free surface of liquid is assumed to be perpendicular to axis of the container and is divided into two parts by the baffle. The method also captures the singular asymptotic behavior of the velocity potential at the sharp baffle edge. The liquid is assumed to be incompressible and inviscid and the method uses matched eigenfunction expansions and Galerkin expansions to derive unknown coefficients presented in the velocity potential series. A finite element analysis is also used to check the validity of the proposed method. The effects of some important parameters of system are also considered on the sloshing frequencies.

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Section: Dynamic Behaviour Of the Fluid-structure Interactionmentioning

confidence: 99%

Sloshing in a Vertical Circular Cylindrical Container With a Vertical Baffle

Askari¹,

Daneshmand

Amabili

2010

ASME 2010 7th International Symposium on Fluid-Structure Interactions, Flow-Sound Interactions, and Flow-Induced Vibration and

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“…Sloshing modes are caused by the oscillation of fluid free surface, whereas bulging modes are related to vibrations of the structure. In fact, it is well known that the effect of the free surface waves is low on bulging modes for structures that are not extremely flexible (Morand and Ohayon 1995, Askari and Daneshmand 2009). In the present paper, attention is focused on the bulging modes of baffled containers.…”

Section: Introductionmentioning

confidence: 99%

Fluid-structure coupling of concentric double FGM shells with different lengths

Moshkelgosha¹,

Askari²,

Jeong³

et al. 2017

Structural Engineering and Mechanics

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The aim of this study is to develop a semi-analytical method to investigate fluid-structure coupling of concentric double shells with different lengths and elastic behaviours. Co-axial shells constitute a cylindrical circular container and a baffle submerged inside the stored fluid. The container shell is made of functionally graded materials with mechanical properties changing through its thickness continuously. The baffle made of steel is fixed along its top edge and submerged inside fluid such that its lower edge freely moves. The developed approach is verified using a commercial finite element computer code. Although the model is presented for a specific case in the present work, it can be generalized to investigate coupling of shellplate structures via fluid. It is shown that the coupling between concentric shells occurs only when they vibrate in a same circumferential mode number, n. It is also revealed that the normalized vibration amplitude of the inner shell is about the same as that of the outer shell, for narrower radial gaps. Moreover, the natural frequencies of the fluid-coupled system gradually decrease and converge to the certain values as the gradient index increases.

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“…However, these studies are concerned with cylindrical shells which are fixed at the bottom, and thus, are different from the problem which is to be solved in this study. Askari and Daneshmand (2009) used the Rayleigh-Ritz method based on Love's shell theory to calculate the natural frequencies and modes of a partially fluid-filled cylindrical container.…”

Section: Introductionmentioning

confidence: 99%