Nonlinear hydroelastic analysis of an aquaculture fish cage in irregular waves

Li, Li; Fu, Shixiao; Yang, Xu

doi:10.1016/j.marstruc.2013.08.002

Cited by 54 publications

(11 citation statements)

References 16 publications

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“…Formerly, Trygve also did modeling studies of the current load on the cage, [6]. Li Li,[7] conducted a study hydroelastic nonlinear analysis of the floating cages on a wave of irregular (irregular waves). Heidi Moe, [8] conducted a study on the structural analysis of the influence of the current net cages.…”

Section: Methodsmentioning

confidence: 99%

The Structural Response Investigation of Modular Pontoon Collar Floating Cage due to Current Load to Support Fish Farming Activities

Windyandari

Zakki

2018

MATEC Web of Conferences

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The size of net cages increases rapidly, reaching volumes above current experience. More exposed locations are used for fish production, introducing higher loads on the net cage and fish farm from strong water currents and large waves. Strength analysis can be a useful tool for development of net-cage designs to avoid escape of fish and ensure sufficient volume for good fish welfare and water quality. The main objectives of this research are to investigate the structural response of modular pontoon collar floating cage due to the current load to support the fish farming activities. Strength analysis was performed using commercial explicit finite element software to calculate the distribution of loads in the net cage due to current, weights and gravity. The net cage was modeled using truss elements that represented several parallel twines. Sub-elements allowed the trusses to buckle in compression, and only negligible compressive forces were seen in the numerical results. Resulting drag loads and cage volume were shown to be dependent on the net cage size and collar shape.

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Section: Methodsmentioning

confidence: 99%

The Structural Response Investigation of Modular Pontoon Collar Floating Cage due to Current Load to Support Fish Farming Activities

Windyandari

Zakki

2018

MATEC Web of Conferences

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“… Also, causes fatigue in the structure ( Bai et al, 2018 , 2016 ). May cause buckling failure in floating collars ( Li et al, 2013 ; Fu and Moan, 2012 ; Huang et al, 2016a ; Jensen et al, 2007 ). Annual 50 th percentile of the significant wave height, m Mean annual significant wave height Peak wave period Monthly average wave height Extreme wave height, m 50-year return period for the significant wave height, m Tides and currents Mean tidal range, m Impact the corrosion ( Zve et al, 2015 ).…”

Section: Reliability Analysis Of the Integrated Systemmentioning

confidence: 99%

Reliability of multi-purpose offshore-facilities: Present status and future direction in Australia

Aryai

Abdussamie

Salehi

et al. 2021

Process Safety and Environmental Protection

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Sustainable use of the ocean for food and energy production is an emerging area of research in different countries around the world. This goal is pursued by the Australian aquaculture, offshore engineering and renewable energy industries, research organisations and the government through the “Blue Economy Cooperative Research Centre”. To address the challenges of offshore food and energy production, leveraging the benefits of co-location, vertical integration, infrastructure and shared services, will be enabled through the development of novel Multi-Purpose Offshore-Platforms (MPOP). The structural integrity of the designed systems when being deployed in the harsh offshore environment is one of the main challenges in developing the MPOPs. Employing structural reliability analysis methods for assessing the structural safety of the novel aquaculture-MPOPs comes with different limitations. This review aims at shedding light on these limitations and discusses the current status and future directions for structural reliability analysis of a novel aquaculture-MPOP considering Australia’s unique environment. To achieve this aim, challenges which exist at different stages of reliability assessment, from data collection and uncertainty quantification to load and structural modelling and reliability analysis implementation, are discussed. Furthermore, several solutions to these challenges are proposed based on the existing knowledge in other sectors, and particularly from the offshore oil and gas industry. Based on the identified gaps in the review process, potential areas for future research are introduced to enable a safer and more reliable operation of the MPOPs.

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“…To improve the computational efficiency, the model was simplified using the method presented by Li et al (2013) in which eight twines were equivalent to a single truss element.…”

Section: Hydrodynamic Force Database Constructionmentioning

confidence: 99%

A Hybrid Empirical-Numerical Method for Hydroelastic Analysis of a Floater-and-Net System

et al. 2016

Journal of Ship Research

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Because of scale effects and inappropriate hydrodynamic models, the nonlinear hydroelastic response of net cages used for fish farming cannot be analyzed precisely with traditional model testing or combinations of FEMs (finite element methods) and load models. In this study, an innovative hybrid method is proposed to determine the hydroelastic response of full-scale floater-and-net systems more accurately. In this method, the net for the fish cage was vertically and peripherally divided into similar interconnected sections with different hydrodynamic parameters, which were assumed to be uniformly distributed over each section. A model of a typical section was subjected to various towing velocities, oscillation periods and amplitudes in a towing tank to simulate the potential motions of all sections in the net under various currents, waves and floater movements. By analyzing the measured hydrodynamic force from this test section, a hydrodynamic force database for a typical net section under various currents, waves and floater motions was built. Finally, based on an FEM, the modified Morison equation and the hydrodynamic force database, the hydroelastic behavior of the full-scale fish cage was calculated with an iterative scheme. It is demonstrated that this hybrid method is able to produce correct hydroelastic response for both steady and oscillatory flows. The hydroelastic response of a 2D example of a full-length net panel with steady currents and floater oscillations was studied in detail.

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Nonlinear hydroelastic analysis of an aquaculture fish cage in irregular waves

Cited by 54 publications

References 16 publications

The Structural Response Investigation of Modular Pontoon Collar Floating Cage due to Current Load to Support Fish Farming Activities

The Structural Response Investigation of Modular Pontoon Collar Floating Cage due to Current Load to Support Fish Farming Activities

Reliability of multi-purpose offshore-facilities: Present status and future direction in Australia

A Hybrid Empirical-Numerical Method for Hydroelastic Analysis of a Floater-and-Net System

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