Optimized design of statically equivalent mooring systems

Félix-González, Iván; Mercier, Richard

doi:10.1016/j.oceaneng.2015.11.002

Cited by 23 publications

(2 citation statements)

References 5 publications

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“…The process involves in general an architectural design phase during which the truncation point and a first estimate of line properties, possibly clump weights, or blocking springs are decided upon. The parameters of the truncated system are then refined by solving an optimization problem [9,10,11], whose objective function is a measure of the difference between the static characteristic of the full-depth and truncated systems. The constraints of the optimization problem can be related to the manufacturability and integrity of the truncated system.…”

Section: Previous Workmentioning

confidence: 99%

Real-Time Hybrid Model Testing of a Top Tensioned Riser: A Numerical Case Study on Interface Time-Delays and Truncation Ratio

Sauder

Sørensen

Larsen

2017

Volume 2: Prof. Carl Martin Larsen and Dr. Owen Oakley Honoring Symposia on CFD and VIV

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This paper investigates the applicability of real-time hybrid model testing (ReaTHM testing) to the study of offshore systems in deep water. The focus is in particular on slender marine structures connecting floating structures to the seabed, and on how they could be truncated so that a model test setup at a reasonable scale could fit existing hydrodynamic laboratory infrastructures. In this context, ReaTHM testing consists in “substructuring” the slender structures in two parts. At the lower part of the water column, the first substructure is numerical, simulated using a nonlinear finite element method. On the upper part of the water column, the other substructure is physically modelled in an ocean basin. Both substructures interact in real-time through a set of sensors and actuators. This paper addresses through a case study the important issue of accuracy of ReaTHM testing, that is how the behavior of the substructured system varies from that of the emulated system. A top-tensioned riser in 1200m water depth is considered, with two truncation locations: 240m and 600m below the free surface. It is assumed that an artefact is introduced by the ReaTHM test setup, namely a time delay induced by e.g. the numerical calculations, or the actuation system. It is first shown how this artefact influences the accuracy of the setup, and then how the truncation ratio influences the tolerance of the ReaTHM test setup to such an artefact.

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Section: Previous Workmentioning

confidence: 99%

Real-Time Hybrid Model Testing of a Top Tensioned Riser: A Numerical Case Study on Interface Time-Delays and Truncation Ratio

Sauder

Sørensen

Larsen

2017

Volume 2: Prof. Carl Martin Larsen and Dr. Owen Oakley Honoring Symposia on CFD and VIV

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“…Monteiro et al [10] compared the Particle Swarm Optimization (PSO) method and Differential Evolution (DE) method by designing a mooring system for a deep-sea floating production platform. Gonzalez and Mercier [11] designed static equivalent moorings using a Genetic Algorithm (GA) to replace a conventional mooring system when testing deep water offshore facilities. The conclusions showed that beyond a certain minimum, increasing population size does not lead to noticeably improved optimal designs as measured by the fitness function.…”

Section: Introductionmentioning

confidence: 99%

Design Optimization of a Mooring System for an Offshore Aquaculture Platform

Wang,

Cui

et al. 2023

JMSE

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In the present paper, the mooring system of an offshore aquaculture platform is designed and optimized, applying a shallow water mooring system design methodology which combines the Non-dominated Sorting Genetic Algorithm-II (NSGA-II) and the cable–platform coupled model. One mooring design is first given using the proposed methodology. Two reference mooring systems are modified based on an NSGA-II design, and AIP criteria and expertise. The hydrodynamic performance of the offshore aquaculture platform with these three mooring systems is compared via use of a potential flow time–domain numerical simulation. A physical model-scale experiment is carried out to validate the numerical coupled model. Both numerical and experimental results confirm the effectiveness of present model. The comparative analysis shows that the mooring system designed using NSGA-II can provide a relative radical solution compared to the other two mooring designs when considering a limited budget.

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A Stable Self-Learning DRNN-PID Control of Multi-Point Mooring System

Chen

2021

Lecture Notes in Electrical Engineering

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Optimized design of statically equivalent mooring systems

Cited by 23 publications

References 5 publications

Real-Time Hybrid Model Testing of a Top Tensioned Riser: A Numerical Case Study on Interface Time-Delays and Truncation Ratio

Real-Time Hybrid Model Testing of a Top Tensioned Riser: A Numerical Case Study on Interface Time-Delays and Truncation Ratio

Design Optimization of a Mooring System for an Offshore Aquaculture Platform

A Stable Self-Learning DRNN-PID Control of Multi-Point Mooring System

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