Analysis of correction methods for ships' measured speed during sea trials

For all new ships sea trials should be carried out as a part of the delivery from the yard to the ship owner. An important part of the delivery sea trial is to determine the speed capability of the ship in the contractual condition, which is traditionally deep, calm water and no wind, at some specified loading condition. However, it is seldom possible to perform this particular test under such conditions, and when the test is done in other conditions, the result is corrected back to the contractual condition. The correction can be of a significant magnitude. The correction procedure can be influenced by different parameters such as wind resistance, shallow water effect, sea currents and added resistance due to diffraction. There are different experimental methods for correction of measured speed. Since the latter parameter is the most important between others, in this article added resistance due to diffraction has been calculated for three ships using existing methods and comparisoned with the speed correction result of shipbuilder company (Hyundai Heavy Industries). The results show considerable deviation between HHI sea trial speed correction method and other methods. So HHI added resistance calculation method needs to be revised.

Saved in:
Bibliographic Details
Main Authors: Golaghapoor Kami, M., Jafarzadeh Khatibani, M., Rabei Gholami, E.
Format: article biblioteca
Language:Persian
Published: 2017
Subjects:Planning, Iran, Method, Speed, Sea trial, Added resistance, Diffraction, Speed correction, HHI,
Online Access:http://hdl.handle.net/1834/39462
Tags: Add Tag
No Tags, Be the first to tag this record!
id dig-aquadocs-1834-39462
record_format koha
spelling dig-aquadocs-1834-394622021-07-16T02:02:38Z Analysis of correction methods for ships' measured speed during sea trials Golaghapoor Kami, M. Jafarzadeh Khatibani, M. Rabei Gholami, E. Planning Iran Method Speed Sea trial Added resistance Diffraction Speed correction HHI For all new ships sea trials should be carried out as a part of the delivery from the yard to the ship owner. An important part of the delivery sea trial is to determine the speed capability of the ship in the contractual condition, which is traditionally deep, calm water and no wind, at some specified loading condition. However, it is seldom possible to perform this particular test under such conditions, and when the test is done in other conditions, the result is corrected back to the contractual condition. The correction can be of a significant magnitude. The correction procedure can be influenced by different parameters such as wind resistance, shallow water effect, sea currents and added resistance due to diffraction. There are different experimental methods for correction of measured speed. Since the latter parameter is the most important between others, in this article added resistance due to diffraction has been calculated for three ships using existing methods and comparisoned with the speed correction result of shipbuilder company (Hyundai Heavy Industries). The results show considerable deviation between HHI sea trial speed correction method and other methods. So HHI added resistance calculation method needs to be revised. 2021-06-24T18:19:15Z 2021-06-24T18:19:15Z 2017 article TRUE 2008-8965 http://hdl.handle.net/1834/39462 fa http://kmsu.ac.ir/ application/pdf application/pdf 125-135 http://aquaticcommons.org/id/eprint/25062 18721 2018-11-16 09:00:16 25062 Khorramshahr University of Marine Science and Technology
institution UNESCO
collection DSpace
country Francia
countrycode FR
component Bibliográfico
access En linea
databasecode dig-aquadocs
tag biblioteca
region Europa del Oeste
libraryname Repositorio AQUADOCS
language Persian
topic Planning
Iran
Method
Speed
Sea trial
Added resistance
Diffraction
Speed correction
HHI
Planning
Iran
Method
Speed
Sea trial
Added resistance
Diffraction
Speed correction
HHI
spellingShingle Planning
Iran
Method
Speed
Sea trial
Added resistance
Diffraction
Speed correction
HHI
Planning
Iran
Method
Speed
Sea trial
Added resistance
Diffraction
Speed correction
HHI
Golaghapoor Kami, M.
Jafarzadeh Khatibani, M.
Rabei Gholami, E.
Analysis of correction methods for ships' measured speed during sea trials
description For all new ships sea trials should be carried out as a part of the delivery from the yard to the ship owner. An important part of the delivery sea trial is to determine the speed capability of the ship in the contractual condition, which is traditionally deep, calm water and no wind, at some specified loading condition. However, it is seldom possible to perform this particular test under such conditions, and when the test is done in other conditions, the result is corrected back to the contractual condition. The correction can be of a significant magnitude. The correction procedure can be influenced by different parameters such as wind resistance, shallow water effect, sea currents and added resistance due to diffraction. There are different experimental methods for correction of measured speed. Since the latter parameter is the most important between others, in this article added resistance due to diffraction has been calculated for three ships using existing methods and comparisoned with the speed correction result of shipbuilder company (Hyundai Heavy Industries). The results show considerable deviation between HHI sea trial speed correction method and other methods. So HHI added resistance calculation method needs to be revised.
format article
topic_facet Planning
Iran
Method
Speed
Sea trial
Added resistance
Diffraction
Speed correction
HHI
author Golaghapoor Kami, M.
Jafarzadeh Khatibani, M.
Rabei Gholami, E.
author_facet Golaghapoor Kami, M.
Jafarzadeh Khatibani, M.
Rabei Gholami, E.
author_sort Golaghapoor Kami, M.
title Analysis of correction methods for ships' measured speed during sea trials
title_short Analysis of correction methods for ships' measured speed during sea trials
title_full Analysis of correction methods for ships' measured speed during sea trials
title_fullStr Analysis of correction methods for ships' measured speed during sea trials
title_full_unstemmed Analysis of correction methods for ships' measured speed during sea trials
title_sort analysis of correction methods for ships' measured speed during sea trials
publishDate 2017
url http://hdl.handle.net/1834/39462
work_keys_str_mv AT golaghapoorkamim analysisofcorrectionmethodsforshipsmeasuredspeedduringseatrials
AT jafarzadehkhatibanim analysisofcorrectionmethodsforshipsmeasuredspeedduringseatrials
AT rabeigholamie analysisofcorrectionmethodsforshipsmeasuredspeedduringseatrials
_version_ 1756079895895605248