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Research Papers: Fluid-Structure Interaction

The Effect of Punching Plates to Suppress the Sloshing in a Gas Liquid Separator

[+] Author and Article Information
Shigehiko Kaneko

Mem. ASME
Professor
Department of Mechanical Engineering,
The University of Tokyo,
Hongo 7-3-1, Bunkyo-ku,
Tokyo 113-8656, Japan
e-mail: kaneko@mech.t.u-tokyo.ac.jp

Hayato Suzuki

Department of Mechanical Engineering,
The University of Tokyo,
Hongo 7-3-1, Bunkyo-ku,
Tokyo 113-8656, Japan
e-mail: hayato2851@gmail.com

Contributed by the Pressure Vessel and Piping Division of ASME for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received October 20, 2013; final manuscript received April 17, 2014; published online August 19, 2014. Assoc. Editor: Samir Ziada.

J. Pressure Vessel Technol 136(5), 051312 (Aug 19, 2014) (7 pages) Paper No: PVT-13-1183; doi: 10.1115/1.4027585 History: Received October 20, 2013; Revised April 17, 2014

Natural gas is relatively clean and its demand is increasing these days. In most of the case, gas fields are located at the bottom of the sea. Therefore, floating production, storage and offloading (FPSO) system is now attracting big attention. This paper is related to dynamical design of FPSO system, specially focused on the free surface elevation in the horizontal cylindrical and axisymmetric liquid vessel with end caps induced by the wave. In this study, the theory on the wave height and resonant frequency in a horizontal cylinder subjected to longitudinal external excitation is developed. Then, the theory capable of taking account of the effect of punching plates is described. Finally, experimental data of resonant wave height up to 3rd mode are shown in comparison with theoretically derived results.

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References

Figures

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Fig. 1

The shape of the tank of floating system [4]

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Fig. 2

Equivalent rectangular model for the horizontal cylinder under longitudinal excitation

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Fig. 3

Natural sloshing frequency of the first mode

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Fig. 4

Natural sloshing frequency of the third mode

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Fig. 5

Schematic view of a rectangular container without punching plate under horizontal excitation

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Fig. 6

Schematic view showing evaluation point

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Fig. 7

Frequency response

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Fig. 8

Three dimensional effect in cylindrical container

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Fig. 9

Schematic view of the container with a punching plate

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Fig. 10

Schematic chart of experimental apparatus

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Fig. 11

Container and plate

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Fig. 12

Pitch diameter ratio of punching plate

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Fig. 13

Punching plate location

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Fig. 14

Frequency response curve (center)

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Fig. 15

Frequency response curve (both sides)

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Fig. 16

Frequency response curve (center and both sides)

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Fig. 17

Second mode sloshing

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Fig. 18

Frequency response curve

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