Current practices in condition assessment of aged ships and floating offshore structures

Wang, G.; Serratella, Chris; Kalghatgi, Sameer

doi:10.1533/9781845695217.1.3

Cited by 4 publications

(3 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Interested readers are directed to existing literature reviews in this field, including (among others) following book [23] and paper [24]. These authors describe common practices for design, maintenance and monitoring of offshore installations.…”

Section: Existing Visualisation Tools In Other Industries (Oil and Gas)mentioning

confidence: 99%

SCADA-Compatible and Scaleable Visualization Tool for Corrosion Monitoring of Offshore Wind Turbine Structures

2022

View full text Add to dashboard Cite

The exploitation of offshore windfarms (WFs) goes hand in hand with large capital expenditures (CAPEX) and operational expenditures (OPEX), as these mechanical installations operate continuously for multiple decades in harsh, saline conditions. OPEX can account for up to 30% of the levelised cost of energy (LCoE) for a deployed offshore wind farm. To maintain the cost-competitiveness of deployed offshore WFs versus other renewable energy sources, their LCoE has to be kept in check, both by minimising the OPEX and optimising the offshore wind energy production. As corrosion, in particular uniform corrosion, is a major cause of failure of offshore wind turbine structures, there is an urgent need for corrosion management systems for deployed offshore wind turbine structures (WTs). Despite the fact that initial corrosion protection solutions are already integrated on some critical structural components such as WT towers, WT transition pieces or WT sub-structure (fixed or floating platforms), these components can still be harshly damaged by the corrosive environmental offshore conditions. The traditional preventive maintenance strategy, in which regular manual inspections by experts are necessary, is widely implemented nowadays in wind farm applications. Unfortunately, for such challenging operating environments, regular human inspections have a significant cost, which eventually increase the OPEX. To minimise the OPEX, remote corrosion monitoring solutions combined with supporting software (SW) tools are thus necessary. This paper focuses on the development of a software (SW) tool for the visualisation of corrosion measurement data. To this end, criteria for efficient structural corrosion analysis were identified, namely a scaleable, SCADA-compatible, secure, web accessible tool that can visualise 3D relationships. In order to be effective, the SW tool requires a tight integration with decision support tools. This paper provides three insights: Firstly, through a literature study and non-exhaustive market study, it is shown that a combined visualisation and decision SW tool is currently non-existing in the market. This gap motivates a need for the development of a custom SW tool. Secondly, the capabilities of the developed custom software tool, consisting of a backend layer and visualisation browser designed for this task are demonstrated and discussed in this paper. This indicates that a SCADA-compatible visualisation software tool is possible, and can be a major stepping stone towards a semi-automated decision support toolchain for offshore wind turbine corrosion monitoring.

show abstract

Section: Existing Visualisation Tools In Other Industries (Oil and Gas)mentioning

confidence: 99%

SCADA-Compatible and Scaleable Visualization Tool for Corrosion Monitoring of Offshore Wind Turbine Structures

2022

View full text Add to dashboard Cite

show abstract

“…Table I. While there seems to be a considerable amount of overlapping between mandatory and industry-driven inspections, Classification Societies play a major role in the inspection regime, performing statutory surveys in addition to class required surveys, and offering consulting services (e.g., CAP) for some types of ships [8].…”

Section: Corrosion Inspections and Monitoringmentioning

confidence: 99%

Corrosion Health Monitoring System for Steel Ship Structures

Babu¹,

Mathiazhagan²,

Nandakumar³

2014

IJESD

View full text Add to dashboard Cite

Abstract-Corrosion represents one of the largest through life cost component of ships. Ship owners and operators recognize that combating corrosion significantly impacts the vessels' reliability, availability and through life costs. Primary objective of this paper is to review various inspections, monitoring systems and life cycle management with respect to corrosion control of ships and to develop the concept of "Corrosion Health" (CH) which would quantify the extent of corrosion at any point of ships' operational life. A system approach in which the ship structure is considered as a corrosion system and divided into several corrosion zones, with distinct characteristics, is presented. Various corrosion assessment criteria for assessment of corrosion condition are listed. A CH rating system for representation of complex corrosion condition with a numeric number along with recommendations for repair/maintenance action is also discussed.Index Terms-Corrosion control of ships, corrosion health, corrosion of ship structure, marine corrosion, monitoring systems, ship inspections.

show abstract

“…Furthermore, as the design lifetime of ship structures is at least 25 years, aging effects need to be appropriately addressed already in the design phase. Due to these reasons, much research effort has been spent in the past few decades, aiming to clarify the physical background and to develop practically applicable models for long-term prediction of both these phenomena [1], [2].…”

Section: Introductionmentioning

confidence: 99%

Aging Effects on Ship Structural Integrity

Jurišić¹,

Parunov

Garbatov

2017

Brod

View full text Add to dashboard Cite

SummaryThe most important degradation effects of ship structures are corrosion and fatigue cracks. Both of these aging effects have clear consequences of increasing the level of stresses and degrading the strength of ship structures for almost all relevant failure modes. This study presents an overview of some recent developments on the aging effects on the ship structural integrity. The analysis of the thickness measurements has been undertaken to improve understanding of the corrosion degradation phenomena and to develop prediction models of aging effects suitable for practical applications in the ship structural design and analysis. The study also deals with the application of the non-linear finite element analysis as a suitable tool for a collapse assessment of uniaxially loaded plates and stiffened panels of ship structures weakened by non-uniform corrosion degradation and fatigue cracks. Experimental studies have also been reviewed to better understand the recently found degradation of mechanical properties of corroded steel, while theoretical calculations have been performed to evaluate consequences of such degradation on the ship structural integrity.

show abstract

Current practices in condition assessment of aged ships and floating offshore structures

Cited by 4 publications

References 5 publications

SCADA-Compatible and Scaleable Visualization Tool for Corrosion Monitoring of Offshore Wind Turbine Structures

SCADA-Compatible and Scaleable Visualization Tool for Corrosion Monitoring of Offshore Wind Turbine Structures

Corrosion Health Monitoring System for Steel Ship Structures

Aging Effects on Ship Structural Integrity

Contact Info

Product

Resources

About