System Reliability Analysis of an Offshore Jacket Platform

Zhao, Yongjun; Dong, Sheng; Jiang, Fengyuan; Soares, C. Guedes

doi:10.1007/s11802-020-4181-2

Cited by 13 publications

(3 citation statements)

References 26 publications

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“…Based on [20], the structural reliability analysis (SRA) and the quantitative risk analysis (QRA) are two categories of reliability assessments. The SRA intends to describe the POF due to the degradation mechanism (i.e., coating damage, corrosion, cracking, deformations, and changes in material properties) [145,146]. Also, the degradation process connected with the uncertainties should be considered in structural analysis.…”

Section: Overall Review Of the Probabilistic Domains On Offshore Structural Assessmentmentioning

confidence: 99%

Offshore Structural Reliability Assessment by Probabilistic Procedures—A Review

Ahmad

Husain²,

Zaki³

et al. 2021

JMSE

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Offshore installations must be built to resist fatigue as well as extreme forces caused by severe environmental conditions. The structural reliability analysis is the popular practise to assess a variety of natural waves determined by the long-term probability distribution of wave heights and corresponding periods on the site. In truth, however, these structures are subjected to arbitrary wave-induced forces in the open ocean. Hence, it is much more reasonable to account for the changed loading characteristics by determining the probabilistic characteristics of the random loads and outcomes responses. The key challenges are uncertainties and the non-linearity of Morison’s drag element, which results in non-Gaussian loading and response distributions. This study would analyze advances achieved to date in a comprehensive probabilistic review of offshore fixed jacket-type platforms.

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Section: Overall Review Of the Probabilistic Domains On Offshore Structural Assessmentmentioning

confidence: 99%

Offshore Structural Reliability Assessment by Probabilistic Procedures—A Review

Ahmad

Husain²,

Zaki³

et al. 2021

JMSE

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“…1 Reliability of the offshore platforms toward external disturbances such as ice loads, waves, currents, and among others has gained considerable interest among researchers in the last two decades. 2 For example, in Zhao et al, 3 the reliability of sizable three-dimensional jacket structures has been studied due to different external disturbances using artificial neural networks. In Konstandakopoulou et al, 4 the effect of repeated earthquakes in three-dimensional offshore platforms has been considered.…”

Section: Introductionmentioning

confidence: 99%

Reinforcement learning-based optimal fault-tolerant control for offshore platforms

Ziaei

Kharrati

Salim

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part I:

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This article investigates a novel reinforcement learning-based fault-tolerant control approach for steel-jacket offshore platforms. In the first step, the dynamic of the steal-jacket offshore platform with an active mass damper is considered, and the equivalent linear time-invariant model is obtained with the actuator fault. In fault-free conditions, an optimal controller is designed to keep the system stable under external wave force. Subsequently, in faulty conditions, the actuator fault is estimated by the fault observer. Next, by inserting the actuator fault estimation into the cost function, the fault-tolerant control problem transforms into the optimal control problem. The online policy iteration is used to minimize the new cost function. Finally, the final control law, which is a mixture of the nominal and the modified control law, stabilizes the offshore platform and improves its performance in the presence of the actuator fault without needing the complete knowledge of the offshore platform. The simulation results show the effectiveness of the proposed method.

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“…Therefore, how to find the main failure modes and how to calculate the failure probability are two key problems in reliability analysis. In terms of structural failure mode search, the most commonly used methods are the optimality criterion method, β-Unzipping method, and branched-and-bound method [30]. Feng et al proposed an optimality criterion method based on the load accumulation to search for major failure modes [31].…”

Section: Introductionmentioning

confidence: 99%

Reliability Evaluation of Hinged Slab Bridge Considering Hinge Joints Damage and Member Failure Credibility

Tan

Kong

Wang³

et al. 2020

Applied Sciences

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The hinged slab bridge is widely used in medium- and small-span bridges because of its simple structure and convenient construction. However, hinge joints damage is the main defect of this kind of bridge, and it is difficult to express the deterministic damage degree of hinge joints in the detection process. A system reliability evaluation method considering fuzzy detection information of hinge joints damage and member failure credibility is proposed in this paper. Firstly, the membership function is used to quantitatively express the fuzzy detection information of hinge joints, and the fuzzy variable is transformed to an equivalent random variable. Secondly, the functional relationship between the transverse distribution coefficient and hinge joints damage is constructed by the modified hinge-jointed plate method and response surface method, and the reliability of the member considering the fuzzy detection information of hinge joints damage is calculated by the first-order second-moment method (FOSM). Then, the failure credibility is introduced to represent the different possibilities of system failure caused by member failure, and a system reliability assessment method of different failure criteria considering member failure credibility is established based on copula theory. Finally, the applicability of the proposed method is verified by taking the reinforced concrete hinged slab bridge as a numerical example.

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System Reliability Analysis of an Offshore Jacket Platform

Cited by 13 publications

References 26 publications

Offshore Structural Reliability Assessment by Probabilistic Procedures—A Review

Offshore Structural Reliability Assessment by Probabilistic Procedures—A Review

Reinforcement learning-based optimal fault-tolerant control for offshore platforms

Reliability Evaluation of Hinged Slab Bridge Considering Hinge Joints Damage and Member Failure Credibility

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