Fatigue damage sensitivity analysis of a naval high speed light craft via spectral fatigue analysis

Magoga, Teresa

doi:10.1080/17445302.2019.1612543

Cited by 4 publications

(1 citation statement)

References 18 publications

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“…Fatigue analysis was influenced by the uncertainty in the input parameters and modeling procedure. Magoga 26 presented validation of SFA against trials data, followed by a study on the sensitivity of fatigue damage incurred in a naval high-speed light craft (HSLC) to various parameters. It was found that the fatigue damage was most sensitive to the significant wave height, though when operational conditions were taken into account the relative importance of the speed and heading increased.…”

Section: Literature Reviewmentioning

confidence: 99%

Efficient fatigue assessment of the upper and lower hopper knuckle connections of an oil tanker

Özgüç

2020

Proceedings of the Institution of Mechanical Engineers, Part M:

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The fatigue of structural details of ships is of great importance in the maritime industry as they can lead to cracks which can jeopardize structural integrity. The hopper knuckle is among the most vulnerable areas in a ship with respect to fatigue damage. Analysis of the hopper knuckle has become mandatory for tankers in the Class Ship Rules and in the International Association of Classification Societies Common Structural Rules. Along with the fatigue damage record of the vessels, the fatigue analysis of the hopper knuckles is essential to ensure that the vessels have sufficient fatigue strength. In the current work, fatigue calculations are performed of the upper and lower hopper knuckle connections within midship of the oil tanker using simplified fatigue calculations based on Det Norske Veritas (DNVGL) Classification Note No. 30.7. The fatigue analysis is based on 25 years of operation in worldwide wave environment. A cargo hold model (½ + 1 + ½) amidships and a local finite element model of the hopper knuckle are generated. The local model provides relevant hotspot stress for fatigue life calculations. The results from the hopper knuckle fatigue analysis show that the vessels may expect fatigue cracks at lower hopper knuckle before the vessel reaches its design life of 25 years. Based on the findings, it is recommended to fit soft brackets and close scallops at the lower hopper knuckle on selected common frames in all cargo holds.

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Section: Literature Reviewmentioning

confidence: 99%

Efficient fatigue assessment of the upper and lower hopper knuckle connections of an oil tanker

Özgüç

2020

Proceedings of the Institution of Mechanical Engineers, Part M:

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The influence of ship stability in waves on naval vessel operational profiles

Petacco,

Gualeni

2023

J. Ocean Eng. Mar. Energy

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Ensuring a widely safe operational profile of naval vessels is one of the leading aspects of the design process. With reference to weather conditions, this kind of vessels often cannot avoid heavy situations to guarantee the continuity and the effectiveness of service. For this reason, an applied research investigation aimed to define guidance in operations is deemed as a worthwhile activity. In particular, the performance in waves under the perspective of intact stability has been considered in this work. The IMO second-generation intact stability criteria have been identified as a suitable tool for these investigations: as a result, there is evidence that operational guidance can be developed for a set of representative naval vessels, following the relevant guidelines. Outcomes have been represented by means of comprehensive polar diagrams addressing the intact stability failures modes. Bearing in mind the actual operational profile, results have been analysed and discussed considering how ship and operating decisions in a seaway condition may affect the performance in terms of ship stability.

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Tactical operator guidance to mitigate naval vessel structural fatigue damage

Thompson

2022

Applied Ocean Research

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Fatigue damage sensitivity analysis of a naval high speed light craft via spectral fatigue analysis

Cited by 4 publications

References 18 publications

Efficient fatigue assessment of the upper and lower hopper knuckle connections of an oil tanker

Efficient fatigue assessment of the upper and lower hopper knuckle connections of an oil tanker

The influence of ship stability in waves on naval vessel operational profiles

Tactical operator guidance to mitigate naval vessel structural fatigue damage

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