Experimental investigation of sloshing effect on the hydrodynamic responses of an FLNG system during side-by-side operation

Xu, Qiaowei; Hu, Zhiqiang; Jiang, Zhe

doi:10.1080/17445302.2016.1274577

Cited by 4 publications

(3 citation statements)

References 15 publications

(15 reference statements)

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“…The shift of the peak frequency is similar to the findings of the free oscillation experiments (a bigger draft results in smaller response frequency; Section 3.2 and Figure 2), which also shows no significant difference between the two ballast options. Comparable results are found by Xu et al [32] for the side-by-side arrangement of a floating LNG tanker.…”

Section: Summary and Comparison Of The Two Different Ballast Optionssupporting

confidence: 54%

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Comparison of a Floating Cylinder with Solid and Water Ballast

Gabl

Davey

Nixon

et al. 2019

Water

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Modelling and understanding the motion of water filled floating objects is important for a wide range of applications including the behaviour of ships and floating platforms. Previous studies either investigated only small movements or applied a very specific (ship) geometry. The presented experiments are conducted using the simplified geometry of an open topped hollow cylinder ballasted to different displacements. Regular waves are used to excite the floating structure, which exhibits rotation angles of over 20 degrees and a heave motion double that of the wave amplitude. Four different drafts are investigated, each with two different ballast options: with (water) and without (solid) a free surface. The comparison shows a small difference in the body’s three translational motions as well as the rotation around the normal axis to the water surface. Significant differences are observed in the rotation about the wave direction comparable to parametric rolling as seen in ships. The three bigger drafts with free surface switch the dominant global rotation direction from pitch to roll, which can clearly be attributed to the sloshing of the internal water. The presented study provides a new dataset and comparison of varying ballast types on device motions, which may be used for future validation experiments.

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Section: Summary and Comparison Of The Two Different Ballast Optionssupporting

confidence: 54%

“…Bigger tanks are more susceptible to damage from pressure peaks caused by the internal sloshing [30,31]. Xu et al [32] and Zhao et al [33] investigated the side-by-side operation of two vessels through experiments at a scale of 1:60. A numerical simulation of such a combination is presented by Zhao et al [34].…”

Section: Introductionmentioning

confidence: 99%

Comparison of a Floating Cylinder with Solid and Water Ballast

Gabl

Davey

Nixon

et al. 2019

Water

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“…Ships containing liquefied natural gas are another comparable application. However, in many cases, these experimental investigations incorporate very complex geometry which is case specific and/or superimposed with complex research questions, e.g., the interaction between two ships [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Experimental Data of a Floating Cylinder in a Wave Tank: Comparison Solid and Water Ballast

Gabl

Davey

Nixon

et al. 2019

Data

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The experimental set-up allows for the comparison of two different ballast options of a floating cylinder in a wave tank. Four different internal water drafts are tested as well as an equivalent solid ballast option. The model is excited by regular waves, which are characterised with five wave gauges in front of the floating cylinder and two behind. Additionally, the time series of the six-degree freedom response of the floating structure is made available. Regular waves with an initial amplitude of 0.05 m and frequencies over the range 0.3 to 1.1 Hz are investigated. This results in a wide range of different responses of the floating structure as well as very big rotations of up to 20 degrees. This dataset allows for identification of the influence caused by the sloshing of the interior water volume and can be used to validate numerical models of fluid–structure–fluid interaction.

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