Thyssen-Waas Ice Transit Bow Seakeeping Study
Conventional naval hull forms allow limited capability in ice covered waters. The potential of the Thyssen-Waas hull form to increase ice breaking effectiveness with a reduction in ice breaking resistance raises possibilities for improving the performance of selected U.S. Navy Ships in arctic region...
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ftdtic:ADA243112 2023-05-15T14:55:40+02:00 Thyssen-Waas Ice Transit Bow Seakeeping Study Thomas III, William L. Lee, Wah T. DAVID TAYLOR RESEARCH CENTER BETHESDA MD SHIP HYDROMECHANICS DEPT 1991-09 text/html http://www.dtic.mil/docs/citations/ADA243112 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA243112 en eng http://www.dtic.mil/docs/citations/ADA243112 Approved for public release; distribution is unlimited. DTIC AND NTIS Snow Ice and Permafrost Operations Research Marine Engineering Structural Engineering and Building Technology *SHIP HULLS *ICEBREAKERS *SHIP MOTION *SEAKEEPING *ARCTIC REGIONS *SEA ICE NAVY MOTION ICE MATHEMATICAL PREDICTION MODEL TESTS SEA STATES CUTTERS SHIP BOWS REAMERS PREDICTIONS NAVAL VESSELS EXPERIMENTAL DATA FORWARD AREAS SLAMMING FREQUENCY STATIONS THYSSEN WAAS HULLS ICE MECHANICS ARCTIC OCEAN SMP(SHIP MOTION PROGRAM) FFG-7 VESSEL LSD-41 VESSEL MUDYUG VESSEL PE62121N Text 1991 ftdtic 2016-02-22T18:02:44Z Conventional naval hull forms allow limited capability in ice covered waters. The potential of the Thyssen-Waas hull form to increase ice breaking effectiveness with a reduction in ice breaking resistance raises possibilities for improving the performance of selected U.S. Navy Ships in arctic regions. It is therefore desirable to investigate the performance of Thyssen-Waas ice transit bow married to selected naval ships. This objective was accomplished in three steps. First, a modification was made to the Navy's Ship Motion Program (SMP) to accurately model the Thyssen-Waas forebody. This was necessary to properly represent the bulges of the reamers/cutters in the bow section. Second, an estimation regarding the quality of the motion predictions was made by comparing the SMP motion predictions with model test data for the Thyssen-Waas icebreaker Mudyug. With satisfactory results from the Mudyug, a seakeeping study was performed of Thyssen-Waas forebodies married to LSD-41 and FFG-7. Numerical predictions indicate the hull forms having a Thyssen-Waas forebody will have less pitch and heave but will slam more frequently in the forward stations than convention naval vessels in higher Sea States. The increase in slamming frequency can be attributed to the flat forebody and shallow stem angle of the Thyssen-Waas bow. Text Arctic Arctic Ocean Ice Icebreaker permafrost Sea ice ice covered waters Defense Technical Information Center: DTIC Technical Reports database Arctic Arctic Ocean |
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Open Polar |
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Defense Technical Information Center: DTIC Technical Reports database |
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ftdtic |
language |
English |
topic |
Snow Ice and Permafrost Operations Research Marine Engineering Structural Engineering and Building Technology *SHIP HULLS *ICEBREAKERS *SHIP MOTION *SEAKEEPING *ARCTIC REGIONS *SEA ICE NAVY MOTION ICE MATHEMATICAL PREDICTION MODEL TESTS SEA STATES CUTTERS SHIP BOWS REAMERS PREDICTIONS NAVAL VESSELS EXPERIMENTAL DATA FORWARD AREAS SLAMMING FREQUENCY STATIONS THYSSEN WAAS HULLS ICE MECHANICS ARCTIC OCEAN SMP(SHIP MOTION PROGRAM) FFG-7 VESSEL LSD-41 VESSEL MUDYUG VESSEL PE62121N |
spellingShingle |
Snow Ice and Permafrost Operations Research Marine Engineering Structural Engineering and Building Technology *SHIP HULLS *ICEBREAKERS *SHIP MOTION *SEAKEEPING *ARCTIC REGIONS *SEA ICE NAVY MOTION ICE MATHEMATICAL PREDICTION MODEL TESTS SEA STATES CUTTERS SHIP BOWS REAMERS PREDICTIONS NAVAL VESSELS EXPERIMENTAL DATA FORWARD AREAS SLAMMING FREQUENCY STATIONS THYSSEN WAAS HULLS ICE MECHANICS ARCTIC OCEAN SMP(SHIP MOTION PROGRAM) FFG-7 VESSEL LSD-41 VESSEL MUDYUG VESSEL PE62121N Thomas III, William L. Lee, Wah T. Thyssen-Waas Ice Transit Bow Seakeeping Study |
topic_facet |
Snow Ice and Permafrost Operations Research Marine Engineering Structural Engineering and Building Technology *SHIP HULLS *ICEBREAKERS *SHIP MOTION *SEAKEEPING *ARCTIC REGIONS *SEA ICE NAVY MOTION ICE MATHEMATICAL PREDICTION MODEL TESTS SEA STATES CUTTERS SHIP BOWS REAMERS PREDICTIONS NAVAL VESSELS EXPERIMENTAL DATA FORWARD AREAS SLAMMING FREQUENCY STATIONS THYSSEN WAAS HULLS ICE MECHANICS ARCTIC OCEAN SMP(SHIP MOTION PROGRAM) FFG-7 VESSEL LSD-41 VESSEL MUDYUG VESSEL PE62121N |
description |
Conventional naval hull forms allow limited capability in ice covered waters. The potential of the Thyssen-Waas hull form to increase ice breaking effectiveness with a reduction in ice breaking resistance raises possibilities for improving the performance of selected U.S. Navy Ships in arctic regions. It is therefore desirable to investigate the performance of Thyssen-Waas ice transit bow married to selected naval ships. This objective was accomplished in three steps. First, a modification was made to the Navy's Ship Motion Program (SMP) to accurately model the Thyssen-Waas forebody. This was necessary to properly represent the bulges of the reamers/cutters in the bow section. Second, an estimation regarding the quality of the motion predictions was made by comparing the SMP motion predictions with model test data for the Thyssen-Waas icebreaker Mudyug. With satisfactory results from the Mudyug, a seakeeping study was performed of Thyssen-Waas forebodies married to LSD-41 and FFG-7. Numerical predictions indicate the hull forms having a Thyssen-Waas forebody will have less pitch and heave but will slam more frequently in the forward stations than convention naval vessels in higher Sea States. The increase in slamming frequency can be attributed to the flat forebody and shallow stem angle of the Thyssen-Waas bow. |
author2 |
DAVID TAYLOR RESEARCH CENTER BETHESDA MD SHIP HYDROMECHANICS DEPT |
format |
Text |
author |
Thomas III, William L. Lee, Wah T. |
author_facet |
Thomas III, William L. Lee, Wah T. |
author_sort |
Thomas III, William L. |
title |
Thyssen-Waas Ice Transit Bow Seakeeping Study |
title_short |
Thyssen-Waas Ice Transit Bow Seakeeping Study |
title_full |
Thyssen-Waas Ice Transit Bow Seakeeping Study |
title_fullStr |
Thyssen-Waas Ice Transit Bow Seakeeping Study |
title_full_unstemmed |
Thyssen-Waas Ice Transit Bow Seakeeping Study |
title_sort |
thyssen-waas ice transit bow seakeeping study |
publishDate |
1991 |
url |
http://www.dtic.mil/docs/citations/ADA243112 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA243112 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Ice Icebreaker permafrost Sea ice ice covered waters |
genre_facet |
Arctic Arctic Ocean Ice Icebreaker permafrost Sea ice ice covered waters |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/ADA243112 |
op_rights |
Approved for public release; distribution is unlimited. |
_version_ |
1766327694461501440 |