Optimization of welded K-node in offshore jacket structure including the stochastic size effect

Larsen, Mikkel Løvenskjold; Arora, Vikas; Adhikari, Sondipon; Clausen, Henrik Bisgaard

doi:10.1016/j.marstruc.2021.103128

Cited by 7 publications

(3 citation statements)

References 25 publications

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“…The manufacturing of modern components requires advanced high-strength steel (AHSS) grades concerning its attractive mechanical features compared to the other applied structural materials [1][2][3], such as a high value of ultimate tensile strength and good fatigue properties [4][5][6][7][8][9][10]. The use of this kind of steel enables obtaining a significant reduction of weight, which is very important, especially for different branches of industry, i.e., automotive for manufacturing at trailer and semi-trailer and safety zones, roofs, sills, bumpers, and seat structures [11][12][13][14] as well as marine, concerning container types production and road transport if reduction of operation loading is considered [15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Docol 1300M Micro-Jet-Cooled Weld in Microstructural and Mechanical Approaches concerning Applications at Cyclic Loading

Węgrzyn,

Gołombek,

Szczucka-Lasota

et al. 2024

Materials

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The application of advanced high-strength steel grades (AHSS) in different kinds of industry is connected to more than their attractive mechanical properties. The present paper focuses on improving the welding Docol 1300M steel to reach an acceptable microstructure and mechanical parameters. It was decided to manufacture joints with different welding parameters using different filler materials. The electrode wires were varied to increase the carbon content in the weld, and nitrogen was added to the argon shielding mixture to obtain non-metallic inclusions that strengthen the fusion zone. Specimens of joints welded with the gas metal arc welding (GMAW) process for non-destructive and destructive tests were examined. Tensile and bending tests as well as microscopic inspections using a light (LM) and scanning electron microscope (SEM) were also conducted. The results from the fatigue test confirmed the validity of the proposed welding process for the Docol 1300M joint. The collected data enabled the following conclusion: The article’s novelty is represented by the use of shielding gas mixtures containing argon and nitrogen in the GMAW welding process of AHSS steel to create titanium non-metallic inclusions, which will translate into better performance properties of the entire joint.

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Section: Introductionmentioning

confidence: 99%

Docol 1300M Micro-Jet-Cooled Weld in Microstructural and Mechanical Approaches concerning Applications at Cyclic Loading

Węgrzyn,

Gołombek,

Szczucka-Lasota

et al. 2024

Materials

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“…This structure is mainly composed of pipes and steel materials welded together. The groove angles at these intersections change continuously according to their spatial position, often altering irregularly in cross-section, and forming complex spatial curves for the weld seams [1][2][3][4][5] . One of the significant challenges in constructing marine platforms lies in the integrating of jacket structures, particularly focusing on the groove construction between the branch and the main pipes.…”

Section: Introductionmentioning

confidence: 99%

Bead Layout and Error Rectification of Groove Weld at Intersecting Structures

Chen,

Guo,

Zhou

et al. 2024

Preprint

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The welding of intersecting structures requires multi-layer multi-pass welding. Manual welding of intersecting curves is being replaced by robotic welding due to its low efficiency and poor consistency. To enhance weld accuracy in intersecting structures and optimize multi-layer multi-pass planning in robot welding of large components, a realistic groove model is devised to address discrepancies between theoretical and actual groove surfaces. This include determining the size of the actual error angle, and the modeling of the actual groove in the intersecting structure. A method for groove error correction is then proposed based on this model. Firstly, the total and the error areas of the actual groove are calculated. Subsequently, the errors for each layer of the groove are computed from the total error area of the groove. Error correction for the groove layout is implemented layer by layer, resulting in an algorithm for multi-layer multi-pass groove layout correction. Additionally, a fitting function that closely approximates the groove profile is derived. This procedure finalizes the groove error correction, and through MATLAB simulation, the corrected intersecting structure groove is modeled, with results aligning with the error correction algorithm. Finally, further simulation and experimentation validate the feasibility, accuracy and effectiveness of the error correction algorithm for multi-layer multi-pass weld planning the actual intersecting structure groove, offering a theoretical foundation for the intricate weld planning required in robotic welding of intersecting components.

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“…Weld seam in offshore jacket structure is different from the conventional in joints with complex spatial intersecting curves, complicated welding curves, large welding grooves, low accuracy of groove dimension, and narrow welding space. [1][2][3] Traditional methods rely on manual welding by senior welders with 6GR qualifications. [4] It is difficult to guarantee the consistency and efficiency of welding quality.…”

Section: Introductionmentioning

confidence: 99%

Forming Control Method of Single‐Layer Multi‐Pass Welding in the Intersection for T/K/Y Joints of Jacket

Huang

Hong

et al. 2023

steel research int.

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Optimization of welded K-node in offshore jacket structure including the stochastic size effect

Cited by 7 publications

References 25 publications

Docol 1300M Micro-Jet-Cooled Weld in Microstructural and Mechanical Approaches concerning Applications at Cyclic Loading

Docol 1300M Micro-Jet-Cooled Weld in Microstructural and Mechanical Approaches concerning Applications at Cyclic Loading

Bead Layout and Error Rectification of Groove Weld at Intersecting Structures

Forming Control Method of Single‐Layer Multi‐Pass Welding in the Intersection for T/K/Y Joints of Jacket

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