Fatigue Assessments of a Jacket-Type Offshore Structure Based on Static and Dynamic Analyses

Mendes, Paulo; Correia, José A.F.O.; Mourão, António; Pereira, Rafael Merenda; Fantuzzi, Nicholas; Jesus, Abílio M.P. De; Calçada, Rui

doi:10.1061/(asce)sc.1943-5576.0000533

Cited by 15 publications

(8 citation statements)

References 49 publications

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“…During the service period of OWTs, the tower is subjected to repeated cyclic loads; studies have found that 80 percent of structural damages are caused by fatigue [8,9]. Monitoring crack depth and length at critical locations such as the tower and weld joints is crucial for evaluating tower integrity.…”

Section: Cracksmentioning

confidence: 99%

“…The potential damage to these supporting structures during operation and maintenance can range from changes in modal parameters to soil strength degradation, erosion, fatigue, cracks, and corrosion [7]. The complex service environment is a primary factor in the degradation of these structures, with fatigue accounting for 80% of structural damage [8,9]. The first offshore wind farm in China began generating electricity in 2010 and has a service life of approximately 25 years.…”

Section: Introductionmentioning

confidence: 99%

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An Overview on Structural Health Monitoring and Fault Diagnosis of Offshore Wind Turbine Support Structures

Yang,

Liang,

Zhu

et al. 2024

JMSE

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The service environment of offshore wind turbine (OWT) support structures is harsh, and it is extremely difficult to replace these structures during their operational lifespan, making their failure a catastrophic event. The structural health monitoring (SHM) of OWT support structures is a crucial aspect of operational maintenance for OWT support structures, aiming to mitigate significant financial losses. This paper systematically summarizes the current monitoring methods and technologies for OWT support structures, including towers and foundations. Through the review of monitoring content and the evolution of monitoring techniques for supporting structures, it delves deeper into the challenges faced by wind turbine monitoring and highlights potential avenues for future development. Then, the current damage identification techniques for OWT towers and foundations are analyzed, exploring various methods including model-based, vibration-based, artificial intelligence and hybrid fault diagnosis methods. The article also examines the advantages and disadvantages of each approach and outlines potential future directions for research and development in this field. Furthermore, it delves into the current damage identification techniques for OWT towers and foundations, discussing prevalent challenges and future directions in this domain. This status review can provide reference and guidance for the monitoring design of OWT support structures, and provide support for the fault diagnosis of OWT support structures.

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Section: Cracksmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An Overview on Structural Health Monitoring and Fault Diagnosis of Offshore Wind Turbine Support Structures

Yang,

Liang,

Zhu

et al. 2024

JMSE

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“…Similarly, Fan et al [ 32 ] evaluated cumulative fatigue damage of the offshore wind turbine structures with various wind loading conditions. Many other scientific studies in the literature have been performed related to the offshore jacket-type, fixed jacket platform, and offshore structural aspects [ 33 , 34 , 35 , 36 , 37 ], structural durability [ 38 , 39 ], new design solutions [ 40 ], nonlinear effects of fatigue analysis [ 41 ], time domain analysis gap effect [ 42 ], effects of stress concentration factors on offshore tubular connections [ 43 , 44 ], and S-N curves [ 45 , 46 , 47 , 48 ].…”

Section: Introductionmentioning

confidence: 99%

Fatigue Crack Monitoring of T-Type Joints in Steel Offshore Oil and Gas Jacket Platform

Ali

Khan

Bashmal

et al. 2021

Sensors

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Several approaches have been used in the past to predict fatigue crack growth rates in T-joints of the offshore structures, but there are relatively few cases of applying structural health monitoring during the non-destructive testing of jacket platforms. This paper presents an experimental method based on the sensing of the piezoelectric sensors and finite element analysis method for studying the fatigue cracks in the offshore steel jacket structure. Three types of joints are selected in the current research work: T-type plate, T-type tube-plate, and T-type tube joints. The finite element analysis model established in the current study computes and analyzes the high stress and high strain regions in the T-type joints. The fatigue damage in the T-type joints was successfully detected by utilizing both the finite element analysis and experimental methods. The results showed that fatigue cracks of the three types of joints are prone to appear at the weld toe and spread in the welding direction. The fatigue damage location of T-type plate and T-type tube-plate joints is more concentrated in the upper weld toe area, and the fatigue damage location of the T-type tube joint is closer to the lower weld toe area.

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“…An assessment of the fatigue damage of a jacketbased 5 MW offshore wind turbine under the combined wind and wave loads showed that wind load is the main cause of structural fatigue damage of offshore wind turbines [3]. Paulo et al [6] evaluated the fatigue life of a jacket offshore turbine through static and dynamic analysis and found that the overall fatigue life decreased on average by 11.45% under the dynamic analysis compared to the static case. When considering the effect of wave nonlinearity on the fatigue damage of large-diameter monopiles of offshore wind turbines, it is shown that the result of a nonlinear wave is 18% larger than that of the linear wave case [7].…”

Section: Introductionmentioning

confidence: 99%

Fatigue Assessment of Monopile Supported Offshore Wind Turbine under Non‐Gaussian Wind Field

Rong

Cheng

et al. 2021

Shock and Vibration

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The vibration of offshore wind turbines caused by external loads is significant, which will cause fatigue damage to offshore wind turbines. Wind load is the main load during the operation period of the wind turbine, and available studies have shown that the external wind field often exhibits certain non-Gaussian characteristics. This article aims to obtain the fatigue assessment of the monopile foundation of the wind turbine under the non-Gaussian wind fields. A 5 MW wind turbine is selected in this article, and OpenFAST is applied to simulate the wind load. By comparing the Mises stress time histories of the pile foundation at a different depth, the fatigue analysis of the critical spots of the pile foundation is obtained. In the analysis of fatigue damage, the rain flow counting method is adopted, and the two-segment S-N curve is selected to analyze the fatigue life of the critical spots. The results show that, by taking the non-Gaussian characteristic of the wind field into account, the fatigue life of the monopile foundation decreases. Therefore, attention should be paid to the influence of non-Gaussian characteristics of wind fields on the fatigue life of monopile-supported wind turbines.

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Fatigue Assessments of a Jacket-Type Offshore Structure Based on Static and Dynamic Analyses

Cited by 15 publications

References 49 publications

An Overview on Structural Health Monitoring and Fault Diagnosis of Offshore Wind Turbine Support Structures

An Overview on Structural Health Monitoring and Fault Diagnosis of Offshore Wind Turbine Support Structures

Fatigue Crack Monitoring of T-Type Joints in Steel Offshore Oil and Gas Jacket Platform

Fatigue Assessment of Monopile Supported Offshore Wind Turbine under Non‐Gaussian Wind Field

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