Potential use of Bayesian Networks for estimating relationship among rotational dynamics of floating offshore wind turbine tower in extreme environmental conditions

Rostam-Alilou, Ali A.; Zhang, Chunwei; Salboukh, Fatemeh; Gunes, Onur

doi:10.1016/j.oceaneng.2021.110230

Cited by 19 publications

(3 citation statements)

References 22 publications

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“…Through the studies, it can be seen that previous studies on sun visors were still not perfect, the research on the wind load of sun visors was different, and the feasibility analysis of sun visor structures under extreme wind environments was even more lacking. Therefore, for modern buildings, this research can play a guiding role in the design and application of cantilevered external shading components under extreme wind conditions [24].…”

Section: Introductionmentioning

confidence: 99%

Structural Safety Analysis of Cantilever External Shading Components of Buildings under Extreme Wind Environment

Lü

Wang

et al. 2022

Processes

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The high intensity of solar radiation and long sunshine time in the Turpan area lead to the necessity of sunshade construction. Sunshade components can effectively block direct solar radiation and the secondary heating of buildings. Through the analysis of the importance and sensitivity of sunshade components, it was found that the importance of sunshade components accounts for the largest proportion of multi-parameters, and the sensitivity of sunshade components accounts for about 60% of the total. At the same time, the change in sunshade length has an important influence on the proportion of air conditioning energy consumption and space comfort when the sunshade length reached the 0.6 m–0.8 m range. The energy consumption curve of air conditioning no longer decreased and tended to be horizontal, which showed that a sunshade could effectively reduce the energy consumption of air conditioning, while the PMV comfort curve gradually increased and tended to be horizontal, indicating that a sunshade could effectively improve indoor comfort; therefore, a sunshade could reduce direct solar radiation, reduce the energy consumption of air conditioning and improve indoor thermal comfort. In view of the extremely harsh climate characteristics of Turpan, although Turpan needs to carry out shading design, as a typical wind-sensitive component, the structural safety of the visor under the action of an extreme wind environment is the primary focus of designers. The design requires wind loads as control loads. Based on the ANSYS Workbench platform, this study used the fluid–structure coupling technology to calculate and solve for the wind load stress and strain of a horizontal sunshade and a vertical sunshade in a cantilevered external sunshade of different buildings orientations. In this study, by solving for the maximum principal stress and maximum principal elastic strain under 10 working conditions, the results showed that the maximum principal stress of the sun visor under all working conditions was 0.39 MPa, which is much smaller than the tensile strength of C25 concrete. The calculated maximum principal elastic strain of the sun visor was 0.12 × 10−4, which is much smaller than the maximum strain value of concrete. Therefore, the wind load under this research condition had no great influence on the structural safety of the concrete sunshade, which proves the structural feasibility of the building sunshade member in the Turpan area, and provides a reference for the future practical engineering of cantilever members in the Turpan area.

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Section: Introductionmentioning

confidence: 99%

Structural Safety Analysis of Cantilever External Shading Components of Buildings under Extreme Wind Environment

Lü

Wang

et al. 2022

Processes

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“…A two-stage Failure Mode and Effect Analysis (FMEA) was proposed by Li et al (2020b) to reduce the uncertainty of FMEA results. Rostam-Alilou et al (2022) also applied the Bayesian Network to predict the relationships and interactions among the dynamic responses of FOWT, which could be used to improve the structural stability of the FOWT. Zhao and Dong (2021) investigated the long-term system reliability for semisubmersible platform mooring structures, and the proposed method was shown to be effective compared with traditional environmental contour methods.…”

Section: Introductionmentioning

confidence: 99%

“…It showed that the tower buckling dominates the component failure probability. Zhang et al (2022) investigated the effects of mooring line failure of a semi-submersible FOWT, including gearbox analysis, and the results revealed relatively small changes in the internal gear forces. Ghane et al (2018) used statistical fault diagnosis to evaluate the condition of the bearing by the main bearing and nacelle axial acceleration.…”

Section: Introductionmentioning

confidence: 99%

A novel multi-dimensional reliability approach for floating wind turbines under power production conditions

Xing

Gaidai

et al. 2022

Front. Mar. Sci.

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Floating offshore wind turbines (FOWT) generate green renewable energy and are a vital part of the modern offshore wind energy industry. Robust predicting extreme offshore loads during FOWT operations is an important safety concern. Excessive structural bending moments may occur during certain sea conditions, posing an operational risk of structural damage. This paper uses the FAST code to analyze offshore wind turbine structural loads due to environmental loads acting on a specific FOWT under actual local environmental conditions. The work proposes a unique Gaidai-Fu-Xing structural reliability approach that is probably best suited for multi-dimensional structural responses that have been simulated or measured over a long period to produce relatively large ergodic time series. In the context of numerical simulation, unlike existing reliability approaches, the novel methodology does not need to re-start simulation again each time the system fails. As shown in this work, an accurate forecast of the probability of system failure can be made using measured structural response. Furthermore, traditional reliability techniques cannot effectively deal with large dimensionality systems and cross-correction across multiple dimensions. The paper aims to establish a state-of-the-art method for extracting essential information concerning extreme responses of the FOWT through simulated time-history data. Three key components of structural loads are analyzed, including the blade-root out-of-plane bending moment, tower fore-aft bending moment, and mooring line tension. The approach suggested in this study allows predicting failure probability efficiently for a non-linear multi-dimensional dynamic system as a whole.

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Vibration analysis of cracked functionally graded elliptical plates based on finite element phase-field model

Ding

Zhao

Fan

et al. 2022

Int J Mech Mater Des

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Potential use of Bayesian Networks for estimating relationship among rotational dynamics of floating offshore wind turbine tower in extreme environmental conditions

Cited by 19 publications

References 22 publications

Structural Safety Analysis of Cantilever External Shading Components of Buildings under Extreme Wind Environment

Structural Safety Analysis of Cantilever External Shading Components of Buildings under Extreme Wind Environment

A novel multi-dimensional reliability approach for floating wind turbines under power production conditions

Vibration analysis of cracked functionally graded elliptical plates based on finite element phase-field model

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