Buffeting response analysis of offshore wind turbines subjected to hurricanes

Amirinia, Gholamreza; Jung, Sungmoon

doi:10.1016/j.oceaneng.2017.06.005

Cited by 27 publications

(7 citation statements)

References 27 publications

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“…The Hs and Tp values are associated with extreme sea-states and were numerically scaled considering the linear wave theory. Reported ocean current and wind velocities during extreme events were taken from the literature [52,53]. A value of 10 cm/s was set for the experiment in order to avoid hydrodynamic reflection by the channel's walls and for protecting the integrity of the floating structure.…”

Section: Doe-anovamentioning

confidence: 99%

DOE-ANOVA for Identifying the Effect of Extreme Sea-States over the Structural Dynamic Parameters of a Floating Structure

Rueda-Bayona¹,

Guzmán²,

Osorio³

2022

MMEP

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Sea extreme events affect the integrity and operation of the offshore structures, then, it is important to analyze wind-waves-currents loads over the structural dynamics. Traditional offshore designing identifies structural parameters with certain limitations: physical modeling involves using shaking tables in dry conditions; numerical simulations have not sufficiently considered the effects of combined extreme waves-wind-current loads over the structure and the significance of the near and far hydrodynamic field over the structure. The non-linear interactions in the near hydrodynamic field generate viscous damping that modifies the dynamic structural parameters of the offshore structures. The traditional determination of structural parameters considers the hydrodynamic forces computed from wave records, omitting fluid-structure interactions that could generate unexpected damped periods and amplification peaks. This study applied physical modeling to determine floating structural parameters, considering combined loads and the effect of far and near hydrodynamic field in the fluid-structure interaction. The calculated transfer functions in the near hydrodynamic field revealed the highest amplification of the structural accelerations, and the transfer functions in the far field did not evidence structural resonance. Finally, this study recommends measuring the near hydrodynamic field and applying DOE-ANOVA for offshore designing to assess the viscous damping that may provoke dangerous structural amplifications.

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Section: Doe-anovamentioning

confidence: 99%

DOE-ANOVA for Identifying the Effect of Extreme Sea-States over the Structural Dynamic Parameters of a Floating Structure

Rueda-Bayona¹,

Guzmán²,

Osorio³

2022

MMEP

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“…The analyses founded that the sector where the valves are accommodated to the cylinder head, which are exposed to high temperatures during engine operation, are the critical areas prompt to LCF. Amirinia and Sungmoon Jung [2017] studied the buffeting response from three hurricane turbulence models which generated LCF damage in turbine tip blade and tower, this work is described in section four. Hamidi Ghaleh Jigh et al [2019] studied an aluminum foam subjected to compression by means of the finite element method using representative volumetric elements, together with the above, a series of experiments were carried out applying static loads that caused localized plastic deformation, which leads to low cycle fatigue.…”

Section: Research Related To Low Cycle Fatigue -Lcfmentioning

confidence: 99%

Review of Low Cycle Fatigue: Issues in Naval and Offshore Engineering

Delgado-Morales¹,

Palma²,

Gu³

et al. 2022

Fundamental Concepts and Models for the Direct Problem

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Fatigue can be understood as a process of progressive localized plastic strain that occurs in a material subject to cyclic stresses and strains at high stress concentration locations, whose concentration can cause cracks and culminate in the material's fracture. The fatigue process begins with the appearance of the crack, later on with growth, and finally propagation. The study of this phenomenon can be divided into the function of the material life in low and high cycle fatigue, but some studies address problems in the ultra-low and high number of cycles. This chapter addresses aspects of low cycle fatigue, as it is a relatively unexplored area and for which there are few references. Therefore, the main objective of this text is to describe the main aspects of low cycle fatigue, presenting diverse applications and potential problems in the context of fatigue behavior of materials. For this contribution, a review of the technical literature will be presented, considering relevant publications in the last decade. The text overview considers experimental and numerical aspects, fatigue damage, fracture behavior, thermomechanical fatigue, as well as real cases describing how a low-cycle fatigue problem can be defined and the way to approach it through the use of engineering tools found in the literature. Even though the low-cycle fatigue approach and analysis technique covers all engineering, the purpose of this chapter will be on marine and ocean engineering. Several cases described in the reviewed works will be addressed, where problems related to welded structures, turbines, pipelines, risers, mooring chains, floating systems, and wind platforms are presented, situations related to marine and offshore equipment will also be described, showing how low cycle fatigue can present itself in the various situations above, considering that low-cycle fatigue problems can cause structures to fracture, which could consequently cause serious injuries to life and marine environment. At the end of the chapter, potential applications and problems where this phenomenon can appear will be presented.

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“…Here, according to Simiu and Scanlan and Amirinia and Jung, a = 200, b = 50, f is the normalized frequency, u * is the friction velocity, and n is the frequency. The far field‐generated wind velocity spectrum versus the Kaimal spectrum and a sample of the time history of the mean‐removed wind velocity is shown in Figure .…”

Section: Excitation Loadsmentioning

confidence: 99%

Vibration control in wind turbines to achieve desired system-level performance under single and multiple hazard loadings

Rezaee

Aly

2018

Struct Control Health Monit

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The increased demand in energy and the need for sustainable and renewable sources of electricity in hazardous environments with significantly growing population yields the installation of more wind turbines in these areas. In addition, the technological development in material and construction methods has led to the building of taller and more flexible turbines, with inherent low structural damping. Installing modern wind turbines in offshore harsh environments or seismic prone areas can cause an increment in the probability of failure due to excessive vibrations. The current study evaluates the performance of onshore and offshore wind turbines under multihazard loads, including wind, wave, earthquake, and mass and aerodynamic imbalances for both parked and operating conditions. The Lagrangian approach is employed to model the wind turbine considering the blade/tower coupling. In order to lessen the vibrations induced by multihazard loads, external smart dampers are used and a novel energy-based probabilistic approach is employed to tune the semiactive controllers. The results show the effectiveness of employing an analytical approach for the design of semiactive controllers in vibration mitigation of a wind turbine subjected to multiple hazards.

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Buffeting response analysis of offshore wind turbines subjected to hurricanes

Cited by 27 publications

References 27 publications

DOE-ANOVA for Identifying the Effect of Extreme Sea-States over the Structural Dynamic Parameters of a Floating Structure

DOE-ANOVA for Identifying the Effect of Extreme Sea-States over the Structural Dynamic Parameters of a Floating Structure

Review of Low Cycle Fatigue: Issues in Naval and Offshore Engineering

Vibration control in wind turbines to achieve desired system-level performance under single and multiple hazard loadings

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