Experimental study on nonlinear sloshing frequency in shallow water tanks under the effects of excitation amplitude and dispersion parameter

Gurusamy, Saravanan; Kumar, Deepak

doi:10.1016/j.oceaneng.2020.107761

Cited by 30 publications

(10 citation statements)

References 30 publications

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“…Here too, the linear assumption provides sufficiently accurate results (Ibrahim et al, 2001; Konar and Ghosh, 2021b). However, very high amplitude excitation leads to violent sloshing, which is highly nonlinear (Gurusamy and Kumar, 2020; Kareem et al, 2009). The sloshing phenomenon for shallow liquid depths under very high amplitude excitation is sometimes represented by a sloshing-slamming analogy, in which the sloshing liquid is represented by a rolling convective liquid mass that slams/impacts on the container walls periodically (Kareem et al, 2009).…”

Section: Classification Of Tldsmentioning

confidence: 99%

A review on various configurations of the passive tuned liquid damper

Konar

Ghosh

2022

Journal of Vibration and Control

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Passive tuned liquid dampers, being cost-effective, easy to implement, and reliable structural vibration control devices, have received significant attention from designers and researchers. Considerable works devoted to the extraction of higher damping, increase in volumetric efficiency, improvement in architectural adaptability, and use in a large spectrum of structures have led to the development of a variety of configurations of passive tuned liquid dampers. Rigorous research efforts are being devoted to the utilization of different forms of tuned liquid dampers for the vibration control of buildings, bridges, chimneys, wind turbines, etc. However, till now, only a few varieties of tuned liquid dampers have been implemented in real-life structures, while the others require further refinement. This necessitates the present work, through which a systematic review on tuned liquid dampers of various configurations for structural response reduction is presented, with a focus on the design of the dampers. To organize the review in a structured manner, the large family of tuned liquid dampers is categorized into five groups based on their energy dissipation mechanism, namely the tuned sloshing damper, tuned liquid column damper, combined tuned sloshing damper-tuned liquid column damper system, compliant liquid damper, and liquid damper with submerged tuned oscillator. The modeling, analysis, design, and performance-related aspects of the different varieties of tuned liquid dampers are covered. The advantages and applicability of the different types of tuned liquid dampers are highlighted along with their real-life installations. The current gaps in the development of the various tuned liquid damper configurations and scope of future developments are also identified.

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Section: Classification Of Tldsmentioning

confidence: 99%

A review on various configurations of the passive tuned liquid damper

Konar

Ghosh

2022

Journal of Vibration and Control

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“…The TLD system was tested experimentally at shallow depth tanks which exitated at different water depths and the ratio of length to width of the tank in the frequency excitation ranges. The test results of TLD system show that the maximum free-surface elevation happens in the low frequency range [7] and the TLD system was designed at low h/L value to get a high damping ratio [22].…”

Section: Introductionmentioning

confidence: 99%

“…One of solution to obtain a structural system that has high damping is by designing the water reservoir which has the same natural frequency with the structure so that the phenomenon of resonance will be reached and give contribution to structure strength [1,8,20]. Beside that, the process of designing the water reservoir on the top of structure can be done by determining the natural frequency of structure and the ratio of water depth to length of reservoir (d/L) to obtain the optimum structure damping [7,9,18,22]. However there are not many the experimental studies have been investigating the effectiveness of TLD at the portal structures with various the ratio of water depth to length of reservoir (d/L).…”

Section: Introductionmentioning

confidence: 99%

The Damping Properties of a Steel Structural Model With a Box-Shaped Water Reservoir Upon Top Floor

Ramdani¹

2023

GEOMATE

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A swimming pool or a reservoir on the roof of the high-rise building may contribute to the damping behavior of the building structure underneath due to the earthquake shake. The water waves in the swimming pool due to earthquake shake produce additional force to the building due to the change of momentum and vise versa. The structure's response supporting the reservoir in the form of lateral deformation and natural frequency is highly influenced by water depth, reservoir dimensions, stiffness of the structure, and the loading patterns. There is an interaction among water waves, box-shaped reservoir, and the structural elements underneath. A study was carried out with a numerical simulation using the DualSPHysics application using a box-shaped reservoir of 200 mm long, with widths of 50 mm, 75 mm, and 100 mm. The reservoir was shaken under lateral sinusoidal forces with various frequencies to produce the maximum force on the reservoir wall. Besides that, a three-story steel structural model having dimensions of 500x500 mm floor plan and 1200 mm high was tested under free vibrations with the box-shaped reservoir as mentioned above. The numerical simulation result indicates that at d/L ratios up to 0.144, the maximum resultant force is still increasing. On the other hand, at the free vibration test of the experimental model, the optimum of damping ratios (ξ) can be indicated by the decreasing lateral amplitudes of the structural model at d/L between 0.2 and 0.4 and at about the natural frequency of the structure i.e 2.2439 Hz.

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“…The results show that when external pressure is applied under boiling conditions, it is confirmed that liquefaction occurred inside the gas pocket and the compressibility of the gas is reduced so that not only the oscillation of the impact pressure is reduced, but the damping effect and pressure rise time also increased. Gurusamy et al [9] conducted a series of experiments to investigate nonlinear shallow water sloshing in detail. It was found that the resonant frequency is sensitive to the excitation amplitude and dispersion parameter (ratio of water-depth to tank-length).…”

Section: Introductionmentioning

confidence: 99%

CFD Simulation and Experimental Study on Coupled Motion Response of Ship with Tank in Beam Waves

Feng

Liu

et al. 2022

JMSE

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Tank sloshing is widely present in many engineering fields, especially in the field of marine. Due to the trend of large-scale liquid cargo ships, it is of great significance to study the coupled motion response of ships with tanks in beam waves. In this study, the CFD (Computational Fluid Dynamics) method and experiments are used to study the response of a ship with/without a tank in beam waves. All the computations are performed by an in-house CFD solver, which is used to solve RANS (Reynold Average Navier-Stokes) equations coupled with six degrees-of-freedom solid-body motion equations. The Level Set Method is used to solve the free surface. Verification work on the grid number and time step size has been conducted. The simulation results agree with the experimental results well, which shows that the numerical method is accurate enough. In this paper, several different working conditions are set up, and the effects of the liquid height in the tank, the size of the tank and the wavelength ratio of the incident wave on the ship’s motion are studied. The results show the effect of tank sloshing on the ship’s motion in different working conditions.

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Experimental study on nonlinear sloshing frequency in shallow water tanks under the effects of excitation amplitude and dispersion parameter

Cited by 30 publications

References 30 publications

A review on various configurations of the passive tuned liquid damper

A review on various configurations of the passive tuned liquid damper

The Damping Properties of a Steel Structural Model With a Box-Shaped Water Reservoir Upon Top Floor

CFD Simulation and Experimental Study on Coupled Motion Response of Ship with Tank in Beam Waves

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