Risk-based framework for ship and structural design accounting for maintenance planning

Garbatov, Y.; Sisci, Francesca; Ventura, Manuel

doi:10.1016/j.oceaneng.2018.07.058

Cited by 32 publications

(23 citation statements)

References 21 publications

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“…A component based optimization of the FDF and maintenance strategy is proposed in Zou et al (2018). A risk-based framework for conceptual design of ships is developed in Garbatov et al (2018), where an ultimate limit state is considered in combination with deterioration due to corrosion.…”

Section: Integrated Structural Design and Life-cycle Integrity Managementmentioning

confidence: 99%

Risk-Based Fatigue Design Considering Inspections and Maintenance

Bismut

Straub

Köhler

2021

ASCE-ASME J. Risk Uncertainty Eng. Syst., Part A: Civ. Eng.

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The different phases of a structure's life-cycle are managed by different teams with little interaction. Correspondingly, the optimization of the individual phases is isolated and does not necessarily result in optimal life-cycle decisions. This motivates the treatment of structural optimization from a broader life-cycle perspective. A framework to enhance the design of structural systems by considering the operation and maintenance phase in the decision process is proposed in this article.The framework focuses on fatigue prone details, but it can be extended to consider other deterioration mechanisms. A hierarchical influence diagram is proposed as an efficient way to represent the probabilistic decision problem while considering system effects, such as the correlation of the deterioration among hot-spots. A simple example is presented to illustrate the implementation of the framework. Challenges and potential applications are discussed.

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Section: Integrated Structural Design and Life-cycle Integrity Managementmentioning

confidence: 99%

Risk-Based Fatigue Design Considering Inspections and Maintenance

Bismut

Straub

Köhler

2021

ASCE-ASME J. Risk Uncertainty Eng. Syst., Part A: Civ. Eng.

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“…The statistical descriptors of the uncertainty coefficients presented in Eqn (21) are assumed to follow the Normal distribution function [29,30]: The First Order Reliability Method, FORM [28] is used to estimate the reliability index of the ultimate limit state. Since the ultimate capacity depends on time -the reliability index isl also time-dependent.…”

Section: Reliability Analysismentioning

confidence: 99%

Structural Reliability Assessment of Corroded Tanker Ship Based on Experimentally Estimated Ultimate Strength

Woloszyk

Garbatov

2019

Polish Maritime Research

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This work deals with the reliability assessment of a tanker ship hull structure subjected to a vertical bending moment and corrosion degradation. The progressive collapse and ultimate load carrying capacity are estimated based on experimentally tested scaled box-shaped-specimens. The translation of the strength estimate of the scaled specimen to the real tanker ship hull structure is performed based on the dimensional theory developing a step-wise linear stress-strain relationship. The load-carrying capacity is considered as a stochastic variable, and the uncertainties resulted from the scaled-specimen to the real-structure strength translation, and the subjected load of the real ship are also accounted for. A sensitivity analysis concerning the stochastic variables, included in the ultimate limit state function is performed. The partial safety factors, in the case of a scaled specimen and real structure, are also identified, and conclusions are derived.

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“…A design framework based on the risk covering structural failure and hazards such as accidental spills, loss of cargo, ship, and crew members' failures was proposed (Garbatov, et al,2018a). The framework was extended into a risk-centred maintenance methodology in determining the ship hull structural system's maintenance plan (Garbatov, et al, 2018b) , thus endorsing its use in the early design stages.…”

Section: Introductionmentioning

confidence: 99%

Advances in Conceptual Ship Design Accounting for the Risk of Environmental Pollution

Garbatov

Georgiev

2021

AJTUV

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The present paper provides a thorough analysis of the prerequisites in adopting a new paradigm in the conceptual ship design accounting for the environmental pollution driven by maritime transportations. A survey of presently issued IMO environmental requirements outlines the framework within ship design solutions. Identified and carefully examined are several competing optimal design solutions, based on the energy efficiency design index introduced for shipbuilding, operation cost, and the resale costs at the end of the service life, which are used as input variables in a risk-based analysis. Reviewed are the immediate steps taken in the risk-based conceptual ship design to minimise the risk of environmental pollution while considering the life cycle assessment and energy efficiency of the ship propulsion system. Brought forth in the current paper are the results of a study into the concept design of series of containerships operating in the Black Sea for transporting 20, 40 and 45-foot containers aimed at identifying the main dimensions, capacity, visibility, freeboard, stability, bow, and stern design, propulsion complex and propeller design, control and manoeuvrability, seakeeping, energy efficiency design index, capital, and operational expenditures, that leads to the required fright rate for the ships in the range of 4,000 to 14,000 DWT. Accordingly, a bulk carrier’s risk-based concept ship design methodology is employed for the ship life cycle assessment and energy efficiency in pursuance of the optimal design solution in reference to the energy efficiency design index as most applicable to shipbuilding, operation, and resale costs at the end of the service life, and used as input variables in the risk estimate.

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Risk-based framework for ship and structural design accounting for maintenance planning

Cited by 32 publications

References 21 publications

Risk-Based Fatigue Design Considering Inspections and Maintenance

Risk-Based Fatigue Design Considering Inspections and Maintenance

Structural Reliability Assessment of Corroded Tanker Ship Based on Experimentally Estimated Ultimate Strength

Advances in Conceptual Ship Design Accounting for the Risk of Environmental Pollution

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