Motions Assessment Using a Time Domain Approach for a Research Ship in Antarctic Waters
An approach combining frequency and time domain analysis is introduced in this study for ship motions assessment. The open-source NEMOH code is utilized to compute the excitation forces and the hydrodynamic coefficients, while heave and pitch motions time histories are determined by solving the Cumm...
Published in: | Journal of Marine Science and Engineering |
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2023
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Online Access: | https://doi.org/10.3390/jmse11030558 |
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ftmdpi:oai:mdpi.com:/2077-1312/11/3/558/ 2023-08-20T04:00:18+02:00 Motions Assessment Using a Time Domain Approach for a Research Ship in Antarctic Waters Silvia Pennino Antonio Scamardella agris 2023-03-06 application/pdf https://doi.org/10.3390/jmse11030558 EN eng Multidisciplinary Digital Publishing Institute Ocean Engineering https://dx.doi.org/10.3390/jmse11030558 https://creativecommons.org/licenses/by/4.0/ Journal of Marine Science and Engineering; Volume 11; Issue 3; Pages: 558 Cummins equations onboard motions measurements weather forecast data vertical motions assessment time-domain simulations Text 2023 ftmdpi https://doi.org/10.3390/jmse11030558 2023-08-01T09:07:53Z An approach combining frequency and time domain analysis is introduced in this study for ship motions assessment. The open-source NEMOH code is utilized to compute the excitation forces and the hydrodynamic coefficients, while heave and pitch motions time histories are determined by solving the Cummins equations in the time domain. The study compares the numerical outcomes for the heave, pitch, and vertical acceleration at the center of gravity with data obtained from a smartphone onboard during an oceanographic expedition in the Antarctic Ocean in early 2020 on the “Laura Bassi” research vessel. In order to validate the proposed method, weather forecast data from the global-WAM (GWAM) model are utilized. The comparison reveals a good agreement between numerical results and onboard measurements, with differences in motion values remaining below 10% and accelerations below 15%. Therefore, the developed code, taking into account its future improvements, represents an initial step towards creating a promising tool for an accurate estimation of ship motions and accelerations. Text Antarc* Antarctic Antarctic Ocean MDPI Open Access Publishing Antarctic The Antarctic Antarctic Ocean Journal of Marine Science and Engineering 11 3 558 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
Cummins equations onboard motions measurements weather forecast data vertical motions assessment time-domain simulations |
spellingShingle |
Cummins equations onboard motions measurements weather forecast data vertical motions assessment time-domain simulations Silvia Pennino Antonio Scamardella Motions Assessment Using a Time Domain Approach for a Research Ship in Antarctic Waters |
topic_facet |
Cummins equations onboard motions measurements weather forecast data vertical motions assessment time-domain simulations |
description |
An approach combining frequency and time domain analysis is introduced in this study for ship motions assessment. The open-source NEMOH code is utilized to compute the excitation forces and the hydrodynamic coefficients, while heave and pitch motions time histories are determined by solving the Cummins equations in the time domain. The study compares the numerical outcomes for the heave, pitch, and vertical acceleration at the center of gravity with data obtained from a smartphone onboard during an oceanographic expedition in the Antarctic Ocean in early 2020 on the “Laura Bassi” research vessel. In order to validate the proposed method, weather forecast data from the global-WAM (GWAM) model are utilized. The comparison reveals a good agreement between numerical results and onboard measurements, with differences in motion values remaining below 10% and accelerations below 15%. Therefore, the developed code, taking into account its future improvements, represents an initial step towards creating a promising tool for an accurate estimation of ship motions and accelerations. |
format |
Text |
author |
Silvia Pennino Antonio Scamardella |
author_facet |
Silvia Pennino Antonio Scamardella |
author_sort |
Silvia Pennino |
title |
Motions Assessment Using a Time Domain Approach for a Research Ship in Antarctic Waters |
title_short |
Motions Assessment Using a Time Domain Approach for a Research Ship in Antarctic Waters |
title_full |
Motions Assessment Using a Time Domain Approach for a Research Ship in Antarctic Waters |
title_fullStr |
Motions Assessment Using a Time Domain Approach for a Research Ship in Antarctic Waters |
title_full_unstemmed |
Motions Assessment Using a Time Domain Approach for a Research Ship in Antarctic Waters |
title_sort |
motions assessment using a time domain approach for a research ship in antarctic waters |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2023 |
url |
https://doi.org/10.3390/jmse11030558 |
op_coverage |
agris |
geographic |
Antarctic The Antarctic Antarctic Ocean |
geographic_facet |
Antarctic The Antarctic Antarctic Ocean |
genre |
Antarc* Antarctic Antarctic Ocean |
genre_facet |
Antarc* Antarctic Antarctic Ocean |
op_source |
Journal of Marine Science and Engineering; Volume 11; Issue 3; Pages: 558 |
op_relation |
Ocean Engineering https://dx.doi.org/10.3390/jmse11030558 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/jmse11030558 |
container_title |
Journal of Marine Science and Engineering |
container_volume |
11 |
container_issue |
3 |
container_start_page |
558 |
_version_ |
1774717490054561792 |