Effects of mooring line design parameters on the line dynamics and fatigue response of subsea mooring lines

Hamid Sedghi, Mehrdad Kimiaei

Research output: Contribution to conferenceAbstract

Abstract

Dynamic characteristics of mooring lines play an important role in overall structural response and fatigue design of mooring systems. Full dynamic analysis including line dynamics is a vital part of fatigue design process although in time domain it needs excessive computational efforts. For fatigue analysis of mooring lines where hundreds of different environmental loads have to be checked, alternative analysis approach such as quasi-dynamic analysis with implicit inclusion of the line dynamic effects are used widely in engineering practice. This paper presents the results of series of case studies on the effects of various mooring line design parameters on the line dynamics as well as the mooring line dynamic fatigue response. Various mooring line composition types (all chain and chain-polyester-chain) used in different mooring configurations (catenary, semi-taut and taut) with variable range of mooring line pretensions connected to a floater in shallow and deep water depths are studied. Ratios of fatigue damage results between dynamic and quasi-dynamic results as well as the relation between fatigue damage and statistical characteristics of the line dynamic responses for different line configurations and load cases are investigated in detail.

Original languageEnglish
DOIs
Publication statusPublished - 1 Jan 2018
EventASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2018 - Madrid Marriott Auditorium Hotel & Conference Centre, Madrid, Spain
Duration: 17 Jun 201822 Jun 2018
https://www.asme.org/events/omae

Conference

ConferenceASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2018
Abbreviated titleOMAE 2018
CountrySpain
CityMadrid
Period17/06/1822/06/18
Internet address

Fingerprint

Mooring
Fatigue of materials
Fatigue damage
Dynamic analysis
Dynamic response
Polyesters
Chemical analysis

Cite this

Sedghi, H., & Kimiaei, M. (2018). Effects of mooring line design parameters on the line dynamics and fatigue response of subsea mooring lines. Abstract from ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2018, Madrid, Spain. https://doi.org/10.1115/OMAE2018-78716
Sedghi, Hamid ; Kimiaei, Mehrdad. / Effects of mooring line design parameters on the line dynamics and fatigue response of subsea mooring lines. Abstract from ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2018, Madrid, Spain.
@conference{fcbbae196859492784cb4c29db09b561,
title = "Effects of mooring line design parameters on the line dynamics and fatigue response of subsea mooring lines",
abstract = "Dynamic characteristics of mooring lines play an important role in overall structural response and fatigue design of mooring systems. Full dynamic analysis including line dynamics is a vital part of fatigue design process although in time domain it needs excessive computational efforts. For fatigue analysis of mooring lines where hundreds of different environmental loads have to be checked, alternative analysis approach such as quasi-dynamic analysis with implicit inclusion of the line dynamic effects are used widely in engineering practice. This paper presents the results of series of case studies on the effects of various mooring line design parameters on the line dynamics as well as the mooring line dynamic fatigue response. Various mooring line composition types (all chain and chain-polyester-chain) used in different mooring configurations (catenary, semi-taut and taut) with variable range of mooring line pretensions connected to a floater in shallow and deep water depths are studied. Ratios of fatigue damage results between dynamic and quasi-dynamic results as well as the relation between fatigue damage and statistical characteristics of the line dynamic responses for different line configurations and load cases are investigated in detail.",
keywords = "Fatigue design, Line dynamics, Mooring lines fatigue, Quasi dynamic analysis",
author = "Hamid Sedghi and Mehrdad Kimiaei",
year = "2018",
month = "1",
day = "1",
doi = "10.1115/OMAE2018-78716",
language = "English",
note = "ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2018, OMAE 2018 ; Conference date: 17-06-2018 Through 22-06-2018",
url = "https://www.asme.org/events/omae",

}

Sedghi, H & Kimiaei, M 2018, 'Effects of mooring line design parameters on the line dynamics and fatigue response of subsea mooring lines' ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2018, Madrid, Spain, 17/06/18 - 22/06/18, . https://doi.org/10.1115/OMAE2018-78716

Effects of mooring line design parameters on the line dynamics and fatigue response of subsea mooring lines. / Sedghi, Hamid; Kimiaei, Mehrdad.

2018. Abstract from ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2018, Madrid, Spain.

Research output: Contribution to conferenceAbstract

TY - CONF

T1 - Effects of mooring line design parameters on the line dynamics and fatigue response of subsea mooring lines

AU - Sedghi, Hamid

AU - Kimiaei, Mehrdad

PY - 2018/1/1

Y1 - 2018/1/1

N2 - Dynamic characteristics of mooring lines play an important role in overall structural response and fatigue design of mooring systems. Full dynamic analysis including line dynamics is a vital part of fatigue design process although in time domain it needs excessive computational efforts. For fatigue analysis of mooring lines where hundreds of different environmental loads have to be checked, alternative analysis approach such as quasi-dynamic analysis with implicit inclusion of the line dynamic effects are used widely in engineering practice. This paper presents the results of series of case studies on the effects of various mooring line design parameters on the line dynamics as well as the mooring line dynamic fatigue response. Various mooring line composition types (all chain and chain-polyester-chain) used in different mooring configurations (catenary, semi-taut and taut) with variable range of mooring line pretensions connected to a floater in shallow and deep water depths are studied. Ratios of fatigue damage results between dynamic and quasi-dynamic results as well as the relation between fatigue damage and statistical characteristics of the line dynamic responses for different line configurations and load cases are investigated in detail.

AB - Dynamic characteristics of mooring lines play an important role in overall structural response and fatigue design of mooring systems. Full dynamic analysis including line dynamics is a vital part of fatigue design process although in time domain it needs excessive computational efforts. For fatigue analysis of mooring lines where hundreds of different environmental loads have to be checked, alternative analysis approach such as quasi-dynamic analysis with implicit inclusion of the line dynamic effects are used widely in engineering practice. This paper presents the results of series of case studies on the effects of various mooring line design parameters on the line dynamics as well as the mooring line dynamic fatigue response. Various mooring line composition types (all chain and chain-polyester-chain) used in different mooring configurations (catenary, semi-taut and taut) with variable range of mooring line pretensions connected to a floater in shallow and deep water depths are studied. Ratios of fatigue damage results between dynamic and quasi-dynamic results as well as the relation between fatigue damage and statistical characteristics of the line dynamic responses for different line configurations and load cases are investigated in detail.

KW - Fatigue design

KW - Line dynamics

KW - Mooring lines fatigue

KW - Quasi dynamic analysis

UR - http://www.scopus.com/inward/record.url?scp=85055535357&partnerID=8YFLogxK

U2 - 10.1115/OMAE2018-78716

DO - 10.1115/OMAE2018-78716

M3 - Abstract

ER -

Sedghi H, Kimiaei M. Effects of mooring line design parameters on the line dynamics and fatigue response of subsea mooring lines. 2018. Abstract from ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2018, Madrid, Spain. https://doi.org/10.1115/OMAE2018-78716