Strengthening, modification and repair techniques’ prioritization for structural integrity control of ageing offshore structures

Samarakoon, S. M. Samindi M. K.; Ratnayake, R. M. Chandima

doi:10.1016/j.ress.2014.10.023

Cited by 32 publications

(22 citation statements)

References 30 publications

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“…A lot of investigations are being carried out on the strengthening, modification, and repair techniques used in offshore constructions. These techniques are classified into five groups: welding, improvement of the weld, clamping, grout filling, and others [10]. Some of them are implemented during the production of the construction as shot peening for treating the multipass welding-inducted residual stresses in offshore wind turbine monopiles [11].…”

Section: Introductionmentioning

confidence: 99%

Dissimilar underwater wet welding of HSLA steels

Tomków

Fydrych

2020

Int J Adv Manuf Technol

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The high-strength low-alloy S460ML and S460N steels were chosen for underwater wet welding of dissimilar T-joints using covered electrodes. For improving the quality of joints, the temper bead welding (TBW) method was used. The application of TBW in pad welding conditions has been investigated earlier but the possibility of usage of this technique in welded joints was not analyzed. The main aim of the study was to check the influence of TBW on the hardness and structures of the heat-affected zone (HAZ) of dissimilar T-joints made in the underwater conditions. The experiments conducted showed that the technique used can reduce the susceptibility to cold cracking by decreasing the hardness in HAZ, which is a result of changes in its structure. The TBW technique reduced the hardness in the HAZ of the S460N steel by 40-50 HV10 and in S460ML by 80-100 HV10. It was also found that the changes in S460ML and S460N were much different, and therefore, the investigated technique can provide better results in the steel characterized by lower carbon equivalent Ce IIW .

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Section: Introductionmentioning

confidence: 99%

Dissimilar underwater wet welding of HSLA steels

Tomków

Fydrych

2020

Int J Adv Manuf Technol

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“…At the beginning, the comparisons of the criteria in relation to the goal (i.e., the selection of the optimal distribution of measurement points) by using the nine-point scale were conducted. The pairwise comparisons were carried out by using the scale presented in Table 4 [19]. The results of the comparisons are presented in Table 5 and they derived from the experience of the user of a coordinate measuring system.…”

Section: Ahp Analysis Of the Considered Models Of The Distributionmentioning

confidence: 99%

“…Table 4. The scale for performing pairwise comparison [19]. The consolidated priorities regarding the considered criteria are presented in Table 6.…”

Section: Ahp Analysis Of the Considered Models Of The Distributionmentioning

confidence: 99%

Selection of the Best Model of Distribution of Measurement Points in Contact Coordinate Measurements of Free-Form Surfaces of Products

Magdziak

2019

Sensors

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The article presents a new method for determining the distribution of measurement points, which can be used in the case of contact coordinate measurements of curvilinear surfaces of products. The developed method is based on multi-criteria decision analysis. In the case of the new method, the selection of the distribution of measurement points on free-form surfaces is carried out based on the analysis of five different criteria. The selection of the best model of the distribution of measurement points results from the accuracy of coordinate measurements, the time needed to complete measurement tasks, the number of measurement points, the accuracy of the substitute surface representing the measured free-form surface and the area where measurement points are located. The purpose of using the developed method of the distribution of measurement points is to increase the performance of coordinate measurements primarily by increasing the automation of strategy planning of measurements of curvilinear surfaces and improving the accuracy of measurements of free-form surfaces of products. The new method takes into account various aspects of coordinate measurements to determine the final model of the distribution of measurement points on measured surfaces of products, thereby increasing the probability of the proper determination (i.e., identifying the highest deviations of a product) of the location of measurement points on the surfaces of a measured object. The paper presents an example of the application of the created method, which concerns the selection of the best model of the distribution of measurement points on a selected free-form surface. This example is based on, among others, the results of experimental investigations, which were carried out by using the ACCURA II coordinate measuring machine equipped with the VAST XXT measuring probe and the Calypso measurement software. The results of investigations indicate a significant reduction in time of coordinate measurements of products when using the new method for determining the distribution of measurement points. However, shortening the time of coordinate measurements does not reduce their accuracy.

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“…With the vigorous exploitation of the world marine resources, ocean engineering is developing rapidly, which makes the ocean engineering cable needs expanding, and its related technology has put forward higher requirements, one important link is the research of submarine cable laying, protection and maintenance [4,5,6]. The science of submarine cable laying and maintenance technology can better use of favorable conditions and avoid unfavorable conditions in the marine environment.…”

Section: Introductionmentioning

confidence: 99%