Multi-floater-mooring coupled time-domain hydro-elastic analysis in regular and irregular waves

Jin, Chungkuk; Bakti, Farid P.; Kim, Moo-Hyun

doi:10.1016/j.apor.2020.102276

Cited by 27 publications

(5 citation statements)

References 33 publications

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“…In this method, a very large floating structure is modeled with multiple rigid bodies and beam elements [26][27][28], as shown in Figure 2. Since the details are described in Ref [29], only essential formulas are included in this paper. The frequency-domain equation of motion for 𝑀 rigid bodies to model the tunnel can be expressed as:…”

Section: Submerged Floating Tunnel Modeling In Frequency Domainmentioning

confidence: 99%

Optimization of Tuned Mass Damper for Submerged Floating Tunnel with Frequency-Domain Dynamics Simulation

Jin

Kim

2022

J. Adv. App. Comput. Math.

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In this study, the Tuned Mass Damper (TMD) optimization is carried out to reduce the resonant motion of Submerged Floating Tunnel (SFT) under wave excitations. The SFT dynamics is evaluated in frequency domain; a new approach to cost-effectively optimizing TMD parameters for a moored system is suggested. Discrete-Module-Beam (DMB) method is used to model the Tunnel; mooring lines are included as equivalent stiffness matrix through static-offset tests by the fully coupled model. Since the frequency-domain dynamics simulation model is employed, a significant reduction in optimization time can be achieved. TMD is installed at the tunnel’s mid-length to mitigate the lateral motion of the Tunnel and coupled with the Tunnel with translational and rotational springs and dampers. The optimization process for TMD parameters is performed through the Genetic Algorithm (GA). The GA generates the TMD mass and spring and damping coefficients. The dynamics simulation is performed under wave conditions and this process is repeated until the stopping criteria is satisfied. Results demonstrate that TMD with optimized parameters significantly reduces the lateral motion, especially near the system’s lowest lateral natural frequency. This frequency-domain optimization also works as intended with significantly decreased optimization time.

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Section: Submerged Floating Tunnel Modeling In Frequency Domainmentioning

confidence: 99%

Optimization of Tuned Mass Damper for Submerged Floating Tunnel with Frequency-Domain Dynamics Simulation

Jin

Kim

2022

J. Adv. App. Comput. Math.

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“…Han et al (2019) explored the effect of four types of fenders, rubber, aluminum alloy, rubber-aluminum foam and aluminum foam-rubber, on the crashworthiness of offshore wind turbines (OWT) [ 3 ]. Jin et al (2020) proposed a new method for solving the time-domain response of moored multi-floating body systems with coupled hydroelastic effects [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

Anti-explosion performance analysis of marine interdiction system based on ALE method

Liu¹,

Li²,

Li³

2023

Heliyon

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“…Irregular waves were considered as superpositions of regular waves. Jin et al [15] considered regular and irregular wave models together. Structural analysis of a floating structure according to regular and irregular wave models was generated through hydroelastic analysis, and the behaviour of floaters was ultimately obtained.…”

Section: Introductionmentioning

confidence: 99%

Numerical modelling of floating structure with coupled Eulerian–Lagrangian technique

Lakušić¹

2022

JCE

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Floating structures are complex systems composed of superstructure, floating-mooring components, and anchors. In this study, the behaviours of a pontoon, which is used as a floating structure, and four mooring elements under different wave loading conditions were investigated. A numerical analysis of the coupled motions of the pontoon, mooring lines, and marine environment was performed. While the mooring lines were modelled as wire elements, the pontoon was modelled as a rigid body with six degrees of freedom. Wave loading conditions were represented using two different wave spectra. The first spectrum (Case I) was generated based on a single sinusoidal wave utilising the JONSWAP spectrum, whereas the second one (Case II) was generated based a superimposed multi-sinusoidal wave. Time-varying motions of the pontoon and tensions of the mooring lines were determined based on the numerical analyses for Cases I and II. Critical values were determined using the results of both cases. The numerical solutions were based on bidirectional fluid–structure interaction (FSI) analysis. A fully non-linear free surface simulation was performed using the coupled Eulerian–Lagrangian (CEL) technique. Furthermore, numerical results were compared with the results obtained from analytical solutions of free surface elevations.

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Multi-floater-mooring coupled time-domain hydro-elastic analysis in regular and irregular waves

Cited by 27 publications

References 33 publications

Optimization of Tuned Mass Damper for Submerged Floating Tunnel with Frequency-Domain Dynamics Simulation

Optimization of Tuned Mass Damper for Submerged Floating Tunnel with Frequency-Domain Dynamics Simulation

Anti-explosion performance analysis of marine interdiction system based on ALE method

Numerical modelling of floating structure with coupled Eulerian–Lagrangian technique

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