Hull Girder Fatigue Damage Estimations of a Large Container Vessel by Spectral Analysis

Ingrid Marie Vincent Andersen, Jørgen Juncher Jensen

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Abstract

This paper deals with fatigue damage estimation from the analysis of full-scale stress measurements in the hull of a large container vessel (9,400 TEU) covering several months of operation.
For onboard decision support and hull monitoring sys-tems, there is a need for a fast reliable method for esti-mation of fatigue damage in the ship hull.
The objective of the study is to investigate whether the higher frequency contributions from the hydroelastic responses (springing and whipping) can satisfactory be included in the fatigue damage estimation by only a few parameters derived from the stress power spectrum as an alternative to rainflow counting.
The outcome of rainflow counting is compared with the results of a narrow-band spectral analysis as well as the outcome of three approaches considering the process as bimodal in order to take the hydroelastic responses into account.
In most cases, the spectral analysis show satisfactory agreement with the results from rainflow counting.
Original languageEnglish
Title of host publicationProceedings of the PRADS 2013
Number of pages9
Publication date2013
Publication statusPublished - 2013
Event12th International Symposium on Practical Design of Ships and Other Floating Structures - Changwon City, Korea, Republic of
Duration: 20 Oct 201325 Oct 2013
Conference number: 12
http://www.prads2013.org/main

Conference

Conference12th International Symposium on Practical Design of Ships and Other Floating Structures
Number12
Country/TerritoryKorea, Republic of
CityChangwon City
Period20/10/201325/10/2013
Internet address

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