Dynamic behaviors of a hinged multi-body floating aquaculture platform under regular waves

Ma, Chao; Bi, Chen; Xu, Zhijing; Zhao, Yunpeng

doi:10.1016/j.oceaneng.2021.110278

Cited by 40 publications

(10 citation statements)

References 32 publications

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“…Longer wavelengths correspond to lower wave frequencies, which is more likely to cause larger surge motion and greater mooring force of the cages. (Bi et al, 2021;Ma et al, 2022a). However, considering the working ability of water flume, the wavelength is too long to ensure that enough of the reflected wave is absorbed by the dissipating material.…”

Section: Test Conditionsmentioning

confidence: 99%

“…Bi et al (2021) studied the hydrodynamic characteristics of a multi-body floating aquaculture platform and measured the horizontal stiffness of a platform's mooring system. Ma et al (2022a) compared the effects of floating aquaculture cages in single and tandem arrangements on the wave field. The relationship between the wavelength and wave-dissipation performance was analyzed.…”

Section: Introductionmentioning

confidence: 99%

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Experimental investigations on the hydrodynamics of a multi-body floating aquaculture platform exposed to sloping seabed environment

Zhao

Xie

2022

Front. Mar. Sci.

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The coastal area near islands has become a key area for aquaculture because of the long offshore distance and suitable wave conditions. There is a topographic change near the islands, and the reflected waves generated by the topography modify the wave field in the aquaculture area, which may cause structural damage to the offshore net cage. Most studies on the hydrodynamic characteristics of aquaculture structures do not consider the effects of topography. Therefore, we investigated the hydrodynamic characteristics and wave field of a multi-body floating aquaculture platform under the influence of sloping seabed by leveraging a physical model approach. The results show that the low-frequency component of the surge motion of the cage on the weather side increases significantly under the influence of sloping seabed. However, the heave and pitch motions change slightly. Considering the presence of the sloping seabed, the wave elevations inside cages have been changed too., The wave breaking inside the cage on the weather side becomes more evident when the incident wavelength is equal to the width of the cage. And its wave response gradually shifts from wave frequency to high frequency. Regarding the cage on the lee side, the wave response inside it is positively correlated with the incident wavelength. The results of this study provide a reference for the design and optimization of aquaculture structures anchored near islands.

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Section: Test Conditionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental investigations on the hydrodynamics of a multi-body floating aquaculture platform exposed to sloping seabed environment

Zhao

Xie

2022

Front. Mar. Sci.

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“…Their numerical simulations verified the effectiveness of the combination of the control strategy and hinge connection. Ma et al (2022) 21 examined the dynamic behaviors of a hinged two-body floating aquaculture platform under regular waves. Their results showed that the hinge-joint rotational stiffness has a predominant influence on the maximum pitch response.…”

Section: Introductionmentioning

confidence: 99%

Motion characteristics of large arrays of modularized floating bodies with hinge connections

2023

Physics of Fluids

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Hinged arrays have garnered increasing interest due to their potential to provide flexible and adaptable solutions for the various challenges faced in ocean development. The effectiveness of these arrays in engineering applications heavily depends on the motion characteristics of each individual module, rather than specific modules, such as the one with the strongest motion. However, the presence of hinge constraints results in coupled motion responses of all modules instead of independent ones. The objective of this study is to investigate the motion behavior of large arrays formed by multiple floaters hinged together, while existing literature mainly focused on two-body hinged systems. Based on the potential flow theory and Rankine source panel method, a numerical program was developed to calculate the hydrodynamic interactions and the coupled motion responses. First, a model test was conducted to validate the developed frequency-domain simulations. A good agreement was achieved. Then, the effects of hinge constraints, the number of modules, and two external constraints on the motion responses of the entire array were discussed. The results indicated that the heave motion of the array subjected to hinge constraints was significantly suppressed, but a strong pitch motion occurred in a larger wavelength range. For hinged arrays, the floaters located at the two ends were most likely to be excited with the strongest motions. Moreover, a shorter hinged array could be used to quantify the trends in the motion of arrays with more floaters. The calculation results also revealed that the motion responses of a hinged array were highly sensitive to the external constraints, e.g., mooring lines.

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“…Nowadays, accurate solution to 3D problems is interesting (Sun et al, 2021). New methods of SPH modeling of challenging fluid–structure interaction (Sun et al, 2021), flexible structures based on the continuum-based shell element (Han et al, 2021), etc., are developed (Bellezi et al, 2022; Cui et al, 2022; Hernandez-Hernandez et al, 2021; Kalliontzis, 2022; Liu et al, 2022a; Ma et al, 2022; Ozsarac et al, 2021; Suthar and Jangid, 2021; Xiao et al, 2022). Some of them need a one-way chase of solid motion because of fast loading such as earthquake-induced motions (Hernandez-Hernandez et al, 2021; Ozsarac et al, 2021) and some of them need optimization of FSI coupling constraints (Nakayama and Washizu, 1981).…”

Section: Introductionmentioning

confidence: 99%

“…Lattice Boltzmann method (LBM) (Xiao et al, 2022), SPH methods (Cui et al, 2022), ALE formulation (Kalliontzis, 2022), and high-order partitioned fluid–structure interaction framework (Liu et al, 2022b) also showed their efficiencies on FSI calculations. In some applications, nonlinearity of the solid comes from its internal mechanisms (Ma et al, 2022) or over coupling by fluid motion (Bellezi et al, 2022; Khorshidi et al, 2022; Xu and Wellens, 2022). A particle–spring approach is usually used for structural dynamics (Monteleone et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Active sloshing control of a circular cylindrical container with FG GPL-RC

Jamalabadi

2022

Journal of Vibration and Control

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The main purpose of the current study is to design a control system for a sloshing system to suppress the vibration of functionally graded graphene platelet-reinforced composite (FG GPL-RC) on the top surface. A set of piezoelectric sensors and actuators are used for active control of fluid-structure coupling in transient seismic analysis of an inviscid liquid sloshing in a cylindrical tank. First, the top surface FG GPL-RC is optimized to satisfy maximum deformation, face failure, mid shear, and face wrinkling by changing the geometrical parameters and weight fraction distribution through the thickness. The nonlinear governing equations of nanocomposite panels with mechanical properties derived from the Halpin–Tsai model are solved by smoothed particle hydrodynamics (SPH) method. A parameter study counting the boundary condition effects, thickness-to-radius ratio, material distribution of the laminates, and dimensions of the sloshing tank on the FG GPL-RC natural frequencies are surveyed and explained in detail. Then, the frequency analysis of the plate with and without sloshing is performed while the inviscid fluid motion is modeled by SPH. The proposed method is validated with available data in the literature. Finally, the active control of the coupled system in response to the external disturbances is completed by a tuned proportional–integral–derivative (PID) controller which used the piezoelectric sheets on the top surface plate. The performance of the proposed control system is illustrated by a comparison of the controlled and uncontrolled transient responses of the coupled hydro-elastic system to the El-Centro seismic load.

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Dynamic behaviors of a hinged multi-body floating aquaculture platform under regular waves

Cited by 40 publications

References 32 publications

Experimental investigations on the hydrodynamics of a multi-body floating aquaculture platform exposed to sloping seabed environment

Experimental investigations on the hydrodynamics of a multi-body floating aquaculture platform exposed to sloping seabed environment

Motion characteristics of large arrays of modularized floating bodies with hinge connections

Active sloshing control of a circular cylindrical container with FG GPL-RC

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