Fatigue damage assessment of mooring lines under the effect of wave climate change and marine corrosion

Du, Jiangfeng; Wang, Hongchao; Wang, Shuqing; Song, Xiancang; Wang, Junrong; Chang, Anteng

doi:10.1016/j.oceaneng.2020.107303

Cited by 34 publications

(13 citation statements)

References 20 publications

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“…In addition, it is considered to be the most accurate approach for evaluating fatigue damage and serves as a benchmark for other methods [27]. The linear fatigue cumulative damage rule ignores the influence of loading sequence on cumulative damage, and the total damage to the structure can be approximately equal to the linear accumulation of each part of structure damage [28]. First, the mooring line tension of the floating offshore wind turbine under each sea state is obtained by coupling dynamic analysis, and then the short-term fatigue damage rate under each sea state is calculated, and then the long-term fatigue damage of the mooring lines is obtained by probability accumulation.…”

Section: Linear Fatigue Cumulative Damage Rulementioning

confidence: 99%

Study on Mooring Design of 15 MW Floating Wind Turbines in South China Sea

Chen,

Jiang,

Zhang

et al. 2023

JMSE

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Wind turbines and floating platform upsizing are major trends in the current offshore wind development. However, harsh environmental conditions increase the risk of anchor dragging and mooring failure when deploying large offshore floating wind turbines. Therefore, it is necessary to design a mooring system for the specific deployment site. This study aims to perform the mooring system design of a floating offshore wind turbine (FOWT) operated in the South China Sea, which is a combination of the IEA 15 MW wind turbine and UMaine VolturnUS-S floating platform. Hydrodynamic coefficients were calculated based on the potential flow theory, considering the environmental loads in the South China Sea. Additionally, the hydrodynamic coefficients were imported into AQWA to calculate the time-domain mooring tension. The mooring design parameters, such as mooring line length, nominal sizes, and anchor point, were determined using the criterion of anchor uplift, maximum breaking strength, and fatigue life, respectively. The design criterion required that the anchor uplift is not more than the allowable value, the long-term breaking limit of mooring with a 100-year return period should be less than the maximum breaking limit, and the fatigue damage accumulation in 50 years should be safe. The mooring design procedure provides a reference for mooring system design and safe operation of large floating wind turbines in the South China Sea.

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Section: Linear Fatigue Cumulative Damage Rulementioning

confidence: 99%

Study on Mooring Design of 15 MW Floating Wind Turbines in South China Sea

Chen,

Jiang,

Zhang

et al. 2023

JMSE

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“…[60]. Du et al reported that if the simultaneous effects of marine corrosion and wave climate change on fatigue life are overlooked, it is possible that fatigue life evaluation faces up to a 35% error in the long term [61]. Therefore, the effects of these factors on reliability and the probability of failure should be considered to obtain results that are close to reality.…”

Section: Reliability and Failure Probabilitymentioning

confidence: 99%

A Comprehensive Review on Design, Monitoring, and Failure in Fixed Offshore Platforms

Amiri

Shaterabadi

Kashyzadeh

et al. 2021

JMSE

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Offshore platforms have had diverse applications in the marine industry, for example, oil or gas platforms can provide facilities to store the oil and gas before transport those to refineries. Offshore wind turbines are another well-known use of the offshore platform for generating power. As platforms encounter various strong forces from water and wind currents, the materials used for these structures are mainly steel or concrete. These platforms are classified into different types, according to the depth of water and their applications. In addition, offshore platforms, as artificial reefs may be used for decades at different marine conditions. Consequently, their design and maintenance are very important, otherwise, they can cause irreparable damage to the environment. This paper presents the latest and most significant design and monitoring methods, such as the optimal probabilistic seismic demand model, multi-objective optimization, dynamic response assessment, robust fault-tolerant control, etc., under different environmental and geographical conditions. Moreover, the effective factors on the life and failure of these offshore structures are comprehensively introduced to enhance awareness of them, which can be very helpful to improve the design and construction of more reliable and durable structures.

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“…Nagao and Lu [6] conducted a series of 2D FEA targeting a PSW and showed that the residual displacement of a PSW is mainly caused by the deformation of subsoil. The effect of soil displacement on PSWs could be more severe in PSWs that have been affected by corrosion [7,8].…”

Section: Introductionmentioning

confidence: 99%

Seismic Performance Assessment of Wide Pile-Supported Wharf Considering Soil Slope and Waveform Duration

Boyke

Nagao

2022

Applied Sciences

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Pile-supported wharf (PSW) is one of the primary port structures and is often damaged by earthquakes. To mitigate the risk of seismic damage to a PSW, its seismic performance should be thoroughly assessed. This study aimed to examine the impact of ground displacement on the seismic performance of PSW with a mild soil slope. We performed soil-structure system finite element analysis targeting a wide PSW. The analysis is divided into two scenarios. In the first scenario, the PSW was modeled without regard for the soil slope, whereas the second scenario considered the soil slope. Two waveforms that matched the target spectral acceleration were used to study the effects of the waveform duration on the seismic response of PSW. The analysis results revealed substantial influences of soil slope displacement as well as differences in waveforms on PSW’s seismic performance.

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Fatigue damage assessment of mooring lines under the effect of wave climate change and marine corrosion

Cited by 34 publications

References 20 publications

Study on Mooring Design of 15 MW Floating Wind Turbines in South China Sea

Study on Mooring Design of 15 MW Floating Wind Turbines in South China Sea

A Comprehensive Review on Design, Monitoring, and Failure in Fixed Offshore Platforms

Seismic Performance Assessment of Wide Pile-Supported Wharf Considering Soil Slope and Waveform Duration

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