Dynamic analysis of a floating spherical buoy fastened by mooring cables

Zhu, Xiangqian; Yoo, Wan-Suk

doi:10.1016/j.oceaneng.2016.06.009

Cited by 34 publications

(9 citation statements)

References 15 publications

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“…Secondly, based on the smoothed particle hydrodynamics (SPH) method, the structure is described as a solid particle, and then the fluid-solid coupling method is used to calculate the forces and motions (Gunn et al, 2018;Domínguez et al, 2019;Altomare et al, 2020;Ropero-Giralda et al, 2020). Thirdly, the geometric relations between non-submerged floating spheres or tubes and wave surface were solved (Zhu et al, 2016a;Zhu et al, 2020;Feng et al, 2021). The Morison equation has the advantage of high efficiency and accuracy in calculating wave force.…”

Section: Component Of the Floating Reefmentioning

confidence: 99%

“…The primary methods are the static and dynamic analysis (Tu et al, 2020). The lumped mass point model is a common method to study the dynamic response of mooring systems (Zhu et al, 2016a;Pan et al, 2021;Palo et al, 2021;Feng et al, 2021a;Zhu et al, 2020;Touzon et al, 2021). The dynamic safety performance of the floating platform with iron chain was studied by Gobat and Grosenbaugh (2001); Agarwal and Jain (2003), and Umar and Datta (2003).…”

Section: Component Of the Floating Reefmentioning

confidence: 99%

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Review of Structure Types and New Development Prospects of Artificial Reefs in China

et al. 2022

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Artificial reefs are beneficial to restore fishery resources and increase fishery production. Meanwhile, they play a significant role in improving ocean ecology and accelerating the evolution of fishery industries. Since they are generally affected by currents, waves, and other hydrological factors, the flow field around artificial reefs and their stabilities have become a research hotspot in recent years. Research on artificial reefs is a systematic process consisting of four aspects: Firstly, the significance, the definition, the mechanism, and the present research progress were introduced for artificial reefs in detail. Secondly, the development trend of the sit-bottom artificial reef and that of the floating artificial reef were summarized, respectively. Thirdly, it was found that the combination of traditional artificial reefs and emerging ocean engineering has a great development potential in practical engineering. Finally, the existing problems related to the hydrodynamic characteristics of the artificial reefs in China were summarized, and the prospects of artificial reefs were proposed. The purpose of this study is to provide a scientific reference for the ecological and sustainable development of the large-scale construction of artificial reefs in the ocean.

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Section: Component Of the Floating Reefmentioning

confidence: 99%

Section: Component Of the Floating Reefmentioning

confidence: 99%

Review of Structure Types and New Development Prospects of Artificial Reefs in China

et al. 2022

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“…Random vibrations of nonlinear stochastic oscillators have been widely investigated over the past decades. Systems, such as rotating machinery (Srinivasan and Soni, 1982), wing blade of helicopter (Namachchivaya, 1991), wave or wind energy harvester (Zhang et al, 2020), and off-shore floating body (Zhu and Yoo, 2016), are subjected to the wind loads or ocean waves, which may be modeled as combined deterministic harmonic and stochastic excitations in some circumstances. Moreover, system may fail long before the stationary state is reached in extremal cases.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the EPC method in analyzing the nonlinear oscillators under both harmonic and Gaussian white noise excitations

Zhu

Gong

et al. 2022

Journal of Vibration and Control

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The objective of the current paper is to study and extend the exponential-polynomial-closure (EPC) method in analyzing the non-stationary response probabilistic solutions of nonlinear stochastic oscillators excited by combined deterministic harmonic and Gaussian white noise excitations. The probabilistic solution of the non-stationary responses of nonlinear stochastic oscillator is expressed as an exponential function of polynomial with time-variant coefficients and then the Fokker–Planck–Kolmogorov equation is solved approximately. Two validation examples are presented. The results obtained by Monte Carlo simulation (MCS) and EPC method are presented to show their good agreement, which confirms the effectiveness of the EPC method for the probabilistic solutions to nonlinear stochastic oscillators. The advantage of the EPC method for analyzing the oscillators with strong nonlinearities is investigated by comparison with Equivalent Linearization method. Furthermore, compared with MCS, the computational efficiency by using the EPC method is increased by about 56 times in the first example and 44 times in the second example.

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“…However, most CALM buoys are cylindrical and easier to model in wave tanks due to size scaling, advances in mathematical modelling on the moorings cum hoses [66][67][68][69][70][71][72][73][74][75][76], and the motion behaviour compared to other floating structures [77][78][79][80][81][82][83]. Other design advances in other related models exist that are non-mathematical but address various problems for these MOS [84][85][86][87][88][89][90][91][92][93][94]. Nonetheless, open sea tests pose a challenge of having minimal control, which could result in some abnormal recordings due to harsh environmental conditions during field trials.…”

Section: Introductionmentioning

confidence: 99%

Mathematical Modelling of Bonded Marine Hoses for Single Point Mooring (SPM) Systems, with Catenary Anchor Leg Mooring (CALM) Buoy Application—A Review

Amaechi

Wang

2021

JMSE

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The application of mathematical analysis has been an essential tool applied on Catenary Anchor Leg Mooring (CALM) buoys, Wave Energy Converters (WEC), point absorber buoys, and various single point mooring (SPM) systems. This enables having mathematical models for bonded marine hoses on SPM systems with application with CALM buoys, which are obviously a requisite for the techno-economic design and operation of these floating structures. Hose models (HM) and mooring models (MM) are utilized on a variety of applications such as SPARs, Semisubmersibles, WECs and CALM buoys. CALM buoys are an application of SPM systems. The goal of this review is to address the subject of marine hoses from mathematical modeling and operational views. To correctly reproduce the behavior of bonded marine hoses, including nonlinear dynamics, and to study their performance, accurate mathematical models are required. The paper gives an overview of the statics and dynamics of offshore/marine hoses. The reviews on marine hose behavior are conducted based on theoretical, numerical, and experimental investigations. The review also covers challenges encountered in hose installation, connection, and hang-off operations. State-of-the-art, developments and recent innovations in mooring applications for SURP (subsea umbilicals, risers, and pipelines) are presented. Finally, this study details the relevant materials that are utilized in hoses and mooring implementations. Some conclusions and recommendations are presented based on this review.

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Dynamic analysis of a floating spherical buoy fastened by mooring cables

Cited by 34 publications

References 15 publications

Review of Structure Types and New Development Prospects of Artificial Reefs in China

Review of Structure Types and New Development Prospects of Artificial Reefs in China

Investigation on the EPC method in analyzing the nonlinear oscillators under both harmonic and Gaussian white noise excitations

Mathematical Modelling of Bonded Marine Hoses for Single Point Mooring (SPM) Systems, with Catenary Anchor Leg Mooring (CALM) Buoy Application—A Review

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