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...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-03-01
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| Series: | Journal of Marine Science and Engineering |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2077-1312/11/3/558 |
| _version_ | 1797610896023879680 |
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| author | Silvia Pennino Antonio Scamardella |
| author_facet | Silvia Pennino Antonio Scamardella |
| author_sort | Silvia Pennino |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-03-11T06:21:22Z |
| format | Article |
| id | doaj.art-9bf0dca9246c423bb435eeeeb34b3cc6 |
| institution | Directory Open Access Journal |
| issn | 2077-1312 |
| language | English |
| last_indexed | 2024-03-11T06:21:22Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj.art-9bf0dca9246c423bb435eeeeb34b3cc62023-11-17T11:57:18ZengMDPI AGJournal of Marine Science and Engineering2077-13122023-03-0111355810.3390/jmse11030558Motions Assessment Using a Time Domain Approach for a Research Ship in Antarctic WatersSilvia Pennino0Antonio Scamardella1Department of Science and Technology, University of Naples “Parthenope”, Centro Direzionale Isola C4, 80143 Naples, ItalyDepartment of Science and Technology, University of Naples “Parthenope”, Centro Direzionale Isola C4, 80143 Naples, ItalyAn 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.https://www.mdpi.com/2077-1312/11/3/558Cummins equationsonboard motions measurementsweather forecast datavertical motions assessmenttime-domain simulations |
| spellingShingle | Silvia Pennino Antonio Scamardella Motions Assessment Using a Time Domain Approach for a Research Ship in Antarctic Waters Journal of Marine Science and Engineering Cummins equations onboard motions measurements weather forecast data vertical motions assessment time-domain simulations |
| title | 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_short | 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 |
| topic | Cummins equations onboard motions measurements weather forecast data vertical motions assessment time-domain simulations |
| url | https://www.mdpi.com/2077-1312/11/3/558 |
| work_keys_str_mv | AT silviapennino motionsassessmentusingatimedomainapproachforaresearchshipinantarcticwaters AT antonioscamardella motionsassessmentusingatimedomainapproachforaresearchshipinantarcticwaters |