Abstract
SAFETOW (Strategic Aid For Escort and Salvage Tugs at Work) is a European project developed to provide masters of disabled vessels and masters of salvage and escort tugs with support tools which will enable them to make decisions in real-time with the best available information. This paper focuses on predicting the dynamics of a tug towing a disabled tanker. Of interest are the course stability, trajectories and time histories of trajectory parameters such as heading and drift angles. The calculation takes into account wind effects (using new generic equations), tow point, and towline length. Different fishtailing instabilities are also investigated, i.e. when tug and disabled tanker are both moving, and in bad weather conditions when tug is positionally fixed and the disabled tanker is weathervaning. For trajectory calculations, the velocity of the tug and the disabled tanker can be either constant or allowed to vary with respect to time. The authors also detail the new generic equations for estimating second order mean wave drift and current generic equations for current forces/moment.
| Language | English |
|---|---|
| Title of host publication | Proceedings of the Fifteenth International Offshore and Polar Engineering Conference |
| Subtitle of host publication | ISOPE 2005 |
| Place of Publication | [Cupertino, Calif.] |
| Pages | 350-357 |
| Number of pages | 8 |
| Publication status | Published - 1 Dec 2005 |
| Event | 15th International Offrshore and Polar Engineering Conference, ISOPE-2005 - Seoul, Korea, Republic of Duration: 19 Jun 2005 → 24 Jun 2005 |
Conference
| Conference | 15th International Offrshore and Polar Engineering Conference, ISOPE-2005 |
|---|---|
| Country | Korea, Republic of |
| City | Seoul |
| Period | 19/06/05 → 24/06/05 |
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Keywords
- course stability
- current force
- second order mean wave drift force
- towing dynamics
- trajectory
- wind force
Cite this
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Fishtailing instabilities in emergency towing of disabled tankers. / Varyani, Kamlesh S.; Barltrop, Nigel D.P.; Pham, Xuan P.
Proceedings of the Fifteenth International Offshore and Polar Engineering Conference: ISOPE 2005. [Cupertino, Calif.], 2005. p. 350-357.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution book
TY - GEN
T1 - Fishtailing instabilities in emergency towing of disabled tankers
AU - Varyani, Kamlesh S.
AU - Barltrop, Nigel D.P.
AU - Pham, Xuan P.
PY - 2005/12/1
Y1 - 2005/12/1
N2 - SAFETOW (Strategic Aid For Escort and Salvage Tugs at Work) is a European project developed to provide masters of disabled vessels and masters of salvage and escort tugs with support tools which will enable them to make decisions in real-time with the best available information. This paper focuses on predicting the dynamics of a tug towing a disabled tanker. Of interest are the course stability, trajectories and time histories of trajectory parameters such as heading and drift angles. The calculation takes into account wind effects (using new generic equations), tow point, and towline length. Different fishtailing instabilities are also investigated, i.e. when tug and disabled tanker are both moving, and in bad weather conditions when tug is positionally fixed and the disabled tanker is weathervaning. For trajectory calculations, the velocity of the tug and the disabled tanker can be either constant or allowed to vary with respect to time. The authors also detail the new generic equations for estimating second order mean wave drift and current generic equations for current forces/moment.
AB - SAFETOW (Strategic Aid For Escort and Salvage Tugs at Work) is a European project developed to provide masters of disabled vessels and masters of salvage and escort tugs with support tools which will enable them to make decisions in real-time with the best available information. This paper focuses on predicting the dynamics of a tug towing a disabled tanker. Of interest are the course stability, trajectories and time histories of trajectory parameters such as heading and drift angles. The calculation takes into account wind effects (using new generic equations), tow point, and towline length. Different fishtailing instabilities are also investigated, i.e. when tug and disabled tanker are both moving, and in bad weather conditions when tug is positionally fixed and the disabled tanker is weathervaning. For trajectory calculations, the velocity of the tug and the disabled tanker can be either constant or allowed to vary with respect to time. The authors also detail the new generic equations for estimating second order mean wave drift and current generic equations for current forces/moment.
KW - course stability
KW - current force
KW - second order mean wave drift force
KW - towing dynamics
KW - trajectory
KW - wind force
UR - http://www.scopus.com/inward/record.url?scp=33646596317&partnerID=8YFLogxK
M3 - Conference contribution book
SN - 1880653648
SN - 9781880653647
SP - 350
EP - 357
BT - Proceedings of the Fifteenth International Offshore and Polar Engineering Conference
CY - [Cupertino, Calif.]
ER -