Reducing roll motion by passive free surface tanks

Ulrik Dam Nielsen; Christian S. Nielsen

doi:10.1115/omae2014-23299

Reducing roll motion by passive free surface tanks

Ulrik Dam Nielsen
, Christian S. Nielsen

Technical University of Denmark

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

Abstract

Roll stabilisation of motorised vessels plays an important part in reducing passenger discomfort and increasing safety and cargo capacity. Passive free surface tanks are considered a low-cost stabilising method, which is efficient at all speeds without increasing hull resistance.
In this study, a mathematical model for evaluating the performance of a passive free surface tank is established. This is done by coupling a roll model to a fluid flow model. As a numerical example, the seakeeping abilities of a container vessel are evaluated. The necessary methods for performing the simulation are presented and the design of a free surface tank is explained. The effects of the passive free surface tank are evaluated and a significant damping effect is observed, particularly in cases with resonant roll.

Original language	English
Title of host publication	Proceedings of the ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering
Number of pages	12
Publisher	The American Society of Mechanical Engineers (ASME)
Publication date	2014
Article number	OMAE2014-23299
DOIs	https://doi.org/10.1115/omae2014-23299
Publication status	Published - 2014
Event	33rd International Conference on Ocean, Offshore and Arctic Engineering - San Francisco, CA, United States Duration: 8 Jun 2014 → 13 Jun 2014 http://www.asmeconferences.org/OMAE2014/

Conference

Conference	33rd International Conference on Ocean, Offshore and Arctic Engineering
Country/Territory	United States
City	San Francisco, CA
Period	08/06/2014 → 13/06/2014
Internet address	http://www.asmeconferences.org/OMAE2014/

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@inproceedings{fae6e77345724f1f9e3c364155fe2b81,

title = "Reducing roll motion by passive free surface tanks",

abstract = "Roll stabilisation of motorised vessels plays an important part in reducing passenger discomfort and increasing safety and cargo capacity. Passive free surface tanks are considered a low-cost stabilising method, which is efficient at all speeds without increasing hull resistance. In this study, a mathematical model for evaluating the performance of a passive free surface tank is established. This is done by coupling a roll model to a fluid flow model. As a numerical example, the seakeeping abilities of a container vessel are evaluated. The necessary methods for performing the simulation are presented and the design of a free surface tank is explained. The effects of the passive free surface tank are evaluated and a significant damping effect is observed, particularly in cases with resonant roll.",

author = "Nielsen, \{Ulrik Dam\} and Nielsen, \{Christian S.\}",

year = "2014",

doi = "10.1115/omae2014-23299",

language = "English",

booktitle = "Proceedings of the ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering",

publisher = "The American Society of Mechanical Engineers (ASME)",

address = "United States",

note = "33rd International Conference on Ocean, Offshore and Arctic Engineering ; Conference date: 08-06-2014 Through 13-06-2014",

url = "http://www.asmeconferences.org/OMAE2014/",

}

Nielsen, UD & Nielsen, CS 2014, Reducing roll motion by passive free surface tanks. in Proceedings of the ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering., OMAE2014-23299, The American Society of Mechanical Engineers (ASME), 33rd International Conference on Ocean, Offshore and Arctic Engineering, San Francisco, CA, United States, 08/06/2014. https://doi.org/10.1115/omae2014-23299

Reducing roll motion by passive free surface tanks. / Nielsen, Ulrik Dam; Nielsen, Christian S.
Proceedings of the ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering. The American Society of Mechanical Engineers (ASME), 2014. OMAE2014-23299.

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

TY - GEN

T1 - Reducing roll motion by passive free surface tanks

AU - Nielsen, Ulrik Dam

AU - Nielsen, Christian S.

PY - 2014

Y1 - 2014

N2 - Roll stabilisation of motorised vessels plays an important part in reducing passenger discomfort and increasing safety and cargo capacity. Passive free surface tanks are considered a low-cost stabilising method, which is efficient at all speeds without increasing hull resistance. In this study, a mathematical model for evaluating the performance of a passive free surface tank is established. This is done by coupling a roll model to a fluid flow model. As a numerical example, the seakeeping abilities of a container vessel are evaluated. The necessary methods for performing the simulation are presented and the design of a free surface tank is explained. The effects of the passive free surface tank are evaluated and a significant damping effect is observed, particularly in cases with resonant roll.

AB - Roll stabilisation of motorised vessels plays an important part in reducing passenger discomfort and increasing safety and cargo capacity. Passive free surface tanks are considered a low-cost stabilising method, which is efficient at all speeds without increasing hull resistance. In this study, a mathematical model for evaluating the performance of a passive free surface tank is established. This is done by coupling a roll model to a fluid flow model. As a numerical example, the seakeeping abilities of a container vessel are evaluated. The necessary methods for performing the simulation are presented and the design of a free surface tank is explained. The effects of the passive free surface tank are evaluated and a significant damping effect is observed, particularly in cases with resonant roll.

U2 - 10.1115/omae2014-23299

DO - 10.1115/omae2014-23299

M3 - Article in proceedings

BT - Proceedings of the ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering

PB - The American Society of Mechanical Engineers (ASME)

T2 - 33rd International Conference on Ocean, Offshore and Arctic Engineering

Y2 - 8 June 2014 through 13 June 2014

ER -

Reducing roll motion by passive free surface tanks

Abstract

Conference

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