A set of canonical problems in sloshing. Part 2: Influence of tank width on impact pressure statistics in regular forced angular motion

Souto-Iglesias, Antonio; Bulian, Gabriele; Botía-Vera, E.

doi:10.1016/j.oceaneng.2015.06.016

Cited by 29 publications

(8 citation statements)

References 33 publications

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“…The middle-filling-level sloshing in different tanks under different excitations has been the topic of numerous researches. A large portion of these studies focused on the sloshing in rectangular tanks under single-degree-of-freedom (longitudinal) translational (Koh et al, 2012;Liu and Zhang, 2019;Liu et al, 2016;Lu et al, 2018;Meng et al, 2020;Pal and Bhattacharyya, 2010;Xue et al, 2017;Xue and Lin, 2011;Zheng et al, 2017) and rotational (Bulian et al, 2014;Chen et al, 2013;Delorme et al, 2009;Souto-Iglesias et al, 2015) excitations. In these cases, the simplification of two-dimensional (2D) waves gives satisfactory predictions of the sloshing wave profile and pressure.…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional sloshing in a scaled membrane LNG tank under combined roll and pitch excitations

et al. 2020

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This paper experimentally investigates the three-dimensional sloshing in a membrane-type LNG (liquefied natural gas) tank under combined roll and pitch excitations. Seven groups of roll and pitch amplitudes are studied. For each group, the roll and pitch have the same frequency, and around ten frequencies are tested in a frequency band that ranges from 0.5 times of the resonance frequency in the length direction of the tank to 1.4 times of the resonance frequency in the tank breadth. The characteristics of the sloshing waves and impact pressures are analysed in detail. It is found that the steady-state sloshing waves can be classified into four patterns: the length-dominant wave, swirling wave, diagonal wave, and breadth-dominant wave. Highlighted is the swirling wave that is observed in most of the cases where the roll and pitch amplitudes are significant and the excitation frequency locates between the resonant frequencies in the two directions. It is hypothesized that the rotational motion of the tank imposes necessary initial conditions to trigger the swirling wave. The swirling wave is always associated with wave impingements at tank corners and induce violent impact pressures. The practical implementation is that reinforcements of the membrane layer should be added or the sloshing wave should be suppressed near the tank corner to mitigate the damages to the interior layer of the membranetype LNG tank.

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Section: Introductionmentioning

confidence: 99%

Three-dimensional sloshing in a scaled membrane LNG tank under combined roll and pitch excitations

et al. 2020

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“…Besides, the impact pressure is an important parameter in the assessment of safety of engineering design. Researchers had conducted large-scale experiments to investigate impact pressure [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

A Calculation Method for the Sloshing Impact Pressure Imposed on the Roof of a Passive Water Storage Tank of AP1000

Zeng

Dang

et al. 2016

Science and Technology of Nuclear Installations

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There is a large water storage tank installed at the top of containment of AP1000, which can supply the passive cooling. In the extreme condition, sloshing of the free surface in the tank may impact on the roof under long-period earthquake. For the safety assessment of structure, it is necessary to calculate the impact pressure caused by water sloshing. Since the behavior of sloshing impacted on the roof is involved into a strong nonlinear phenomenon, it is a little difficult to calculate such pressure by theoretical or numerical method currently. But it is applicable to calculate the height of sloshing in a tank without roof. In the present paper, a simplified method was proposed to calculate the impact pressure using the sloshing wave height, in which we first marked the position of the height of roof, then produced sloshing in the tank without roof and recorded the maximum wave height, and finally regarded approximately the difference between maximum wave height and roof height as the impact pressure head. We also designed an experiment to verify this method. The experimental result showed that this method overpredicted the impact pressure with a certain error of no more than 35%. By the experiment, we conclude that this method is conservative and applicable for the engineering design.

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“…Bazı diğer çalışmalarda ise görüntü işleme yöntemini ön planda tutarak sıvı-katı etkileşimi analiz edilmiştir. Araştırmacılar tarafından [20][21][22][23][24][25] tank içindeki serbest sıvı yüzey deformasyonu hızlı kamera kullanarak görüntü işleme metodu ile analiz edilmiş ve verileri nümerik sonuçlarla karşılaştırılmıştır. Tosun vd.…”

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Perde Tipi Engellerin Çalkantı Yüklerini Azaltma Etkileri Üzerine Deneysel Bir Çalışma

Korkmaz¹,

Yiğit²,

Güzel³

2021

El-Cezeri Fen Ve Mühendislik Dergisi

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Bu çalışmada bir tank içerisine yerleştirilen perde tipi engellerin çalkantı yüklerine etkisi engelsiz duruma göre karşılaştırmalı olarak incelenmiştir. Dikdörtgen kesitli bir tank modeli %27 akışkan doluluk oranında eksenel yönde ileri-geri hareket ettirilerek çalkantı oluşturulmuştur. Serbest yüzeyde oluşan deformasyonun etkisiyle yan duvarlarda oluşan basınç kuvvetleri yan duvarlara monte edilen basınç sensörleri vasıtasıyla ölçülmüştür. İlk olarak delikli perdeli ve perdesiz durumlarda oluşan çalkantı aşamaları hızlı kamera vasıtasıyla izlenerek serbest yüzey deformasyonun değişim aşamaları analiz edilmiştir. Aynı zamanda delikli perdeli ve perdesiz durumlar için deney sistemi aynı frekansta tahrik edilerek basınç değerleri ölçülmüştür. Perdeler sayesinde tank içindeki akışkan kütlesinin hareketlerinde değişimler oluşması neticesinde dalga formunun gelişimi ve yan duvarlardaki maksimum basınca ulaşma süreleri değişmiştir. Perdeler sayesinde gerçekleşen bu farklılıklar neticesinde akışkanın yan duvarlarda oluşturduğu basınç değerlerinde % 40-60 oranında azalmalar tespit edilmiştir. Tanklara yerleştirilen bu tür pasif engeller sayesinde tanklarda meydana gelebilecek yapısal zararların önüne geçilerek gemi stabilitesi bozulmadan daha güvenli bir seyir gerçekleştirilebileceği öngörülmektedir.

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A set of canonical problems in sloshing. Part 2: Influence of tank width on impact pressure statistics in regular forced angular motion

Cited by 29 publications

References 33 publications

Three-dimensional sloshing in a scaled membrane LNG tank under combined roll and pitch excitations

Three-dimensional sloshing in a scaled membrane LNG tank under combined roll and pitch excitations

A Calculation Method for the Sloshing Impact Pressure Imposed on the Roof of a Passive Water Storage Tank of AP1000

Perde Tipi Engellerin Çalkantı Yüklerini Azaltma Etkileri Üzerine Deneysel Bir Çalışma

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