eprintid: 10091080
rev_number: 15
eprint_status: archive
userid: 608
dir: disk0/10/09/10/80
datestamp: 2020-02-14 11:19:37
lastmod: 2021-10-02 22:12:28
status_changed: 2020-02-14 11:19:37
type: article
metadata_visibility: show
creators_name: Magoga, T
creators_name: Ojeda, R
creators_name: Cannon, S
creators_name: Thomas, G
title: Interdependencies between variables in fatigue analysis of a weight- optimised naval ship optimised naval ship
ispublished: pub
divisions: UCL
divisions: B04
divisions: C05
divisions: F45
keywords: Fatigue life; naval ships; hull monitoring; slamming
note: This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
abstract: Modern warships are often constructed from aluminium alloys or high tensile steel, and their increasing range of operational roles indicates exposure to harsh seaway loads including slamming. These factors can lead to fatigue cracking, which can reduce operational availability. The objective of the present study is to improve understanding of the influence of variables in the fatigue analysis of a weight-optimised warship. The objective is met by analysing hull monitoring data acquired from a 56 m naval aluminium patrol boat, to determine the long-term importance of slamming and the correlation between the hourly number of slams, ship speed, and fatigue damage at two structural details. It was found that the effect of the ship’s speed on the fatigue damage is not statistically significant. In addition, a sizable proportion of the fatigue damage accumulated at low to moderate ship speed, when the patrol boat experienced slamming, rather than at higher speeds. This may be due to voluntary and/or involuntary speed reduction, which is not typically taken into account in numerical fatigue analysis. That is, the use of long-term distributions of the wave environment and ship speed may mask the effects of voluntary and/or involuntary speed reduction on slamming occurrence and the fatigue damage. This finding can lead to improved requirements setting and through-life structural management of weight-optimised warships.
date: 2019
date_type: published
official_url: https://doi.org/10.1016/j.prostr.2020.01.034
oa_status: green
full_text_type: pub
language: eng
primo: open
primo_central: open_green
verified: verified_manual
elements_id: 1748205
doi: 10.1016/j.prostr.2020.01.034
lyricists_name: Thomas, Giles
lyricists_id: GTHOM34
actors_name: Thomas, Giles
actors_id: GTHOM34
actors_role: owner
full_text_status: public
publication: Procedia Structural Integrity
volume: 22
pagerange: 267-274
citation:        Magoga, T;    Ojeda, R;    Cannon, S;    Thomas, G;      (2019)    Interdependencies between variables in fatigue analysis of a weight- optimised naval ship optimised naval ship.                   Procedia Structural Integrity , 22    pp. 267-274.    10.1016/j.prostr.2020.01.034 <https://doi.org/10.1016/j.prostr.2020.01.034>.       Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/10091080/1/teresa%20procedia%20structural%20integrity%202020.pdf