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CFD prediction of ship capsize: Para...

Sadat Hosseini, Seyed Hamid.

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CFD prediction of ship capsize: Parametric rolling, broaching, surf -riding, and periodic motions.

Record Type:	Electronic resources : Monograph/item
Title/Author:	CFD prediction of ship capsize: Parametric rolling, broaching, surf -riding, and periodic motions./
Author:	Sadat Hosseini, Seyed Hamid.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2009,
Description:	250 p.
Notes:	Source: Dissertations Abstracts International, Volume: 71-09, Section: B.
Contained By:	Dissertations Abstracts International71-09B.
Subject:	Naval engineering. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3390201
ISBN:	9781109583052

CFD prediction of ship capsize: Parametric rolling, broaching, surf -riding, and periodic motions.
Sadat Hosseini, Seyed Hamid.

CFD prediction of ship capsize: Parametric rolling, broaching, surf -riding, and periodic motions. - Ann Arbor : ProQuest Dissertations & Theses, 2009 - 250 p.

Source: Dissertations Abstracts International, Volume: 71-09, Section: B.

Thesis (Ph.D.)--The University of Iowa, 2009.

This item must not be sold to any third party vendors.

Stability against capsizing is one of the most fundamental requirements to design a ship. In this research, for the first time, CFD is performed to predict main modes of capsizing. CFD first is conducted to predict parametric rolling for a naval ship. Then CFD study of parametric rolling is extended for prediction of broaching both by using CFD as input to NDA model of broaching in replacement of EFD inputs or by using CFD for complete simulation of broaching. The CFD resistance, static heel and drift in calm water and static heel in following wave simulations are conducted to estimate inputs for NDA and 6DOF simulation in following waves are conducted for complete modeling of broaching. CFD parametric rolling simulations show remarkably close agreement with EFD. The CFD stabilized roll angle is very close to those of EFD but CFD predicts larger instability zones. The CFD and EFD results are analyzed with consideration ship theory and compared with NDA. NDA predictions are in qualitative agreement with CFD and EFD. CFD and EFD full Fr curve resistance, static heel and drift in calm water, and static heel in following waves results show fairly close agreement. CFD shows reasonable agreement for static heel and drift linear maneuvering derivatives, whereas large errors are indicated for nonlinear derivatives. The CFD and EFD results are analyzed with consideration ship theory and compared with NDA models. The surge force in following wave is also estimated from Potential Theory and compared with CFD and EFD. It is shown that CFD reproduces the decrease of the surge force near the Fr of 0.2 whereas Potential Theory fails. The CFD broaching simulations are performed for series of heading and Fr and results are compared with the predictions of NDA based on CFD, EFD, and Potential Theory inputs. CFD free model simulations show promising results predicting the instability boundary accurately. CFD calculation of wave and rudders yaw moment explains the processes of surf-riding, broaching, and periodic motion. The NDA simulation using CFD and Potential Flow inputs suggests that CFD/Potential Flow can be considered as replacement for EFD inputs.

ISBN: 9781109583052Subjects--Topical Terms:

3173824
Naval engineering.
Subjects--Index Terms:

Broaching

CFD prediction of ship capsize: Parametric rolling, broaching, surf -riding, and periodic motions.
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100 1 $a Sadat Hosseini, Seyed Hamid. $3 3544550
245 1 0 $a CFD prediction of ship capsize: Parametric rolling, broaching, surf -riding, and periodic motions.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2009
300 $a 250 p.
500 $a Source: Dissertations Abstracts International, Volume: 71-09, Section: B.
500 $a Publisher info.: Dissertation/Thesis.
500 $a Advisor: Stern, Frederick;Carrica, Pablo M.
502 $a Thesis (Ph.D.)--The University of Iowa, 2009.
506 $a This item must not be sold to any third party vendors.
520 $a Stability against capsizing is one of the most fundamental requirements to design a ship. In this research, for the first time, CFD is performed to predict main modes of capsizing. CFD first is conducted to predict parametric rolling for a naval ship. Then CFD study of parametric rolling is extended for prediction of broaching both by using CFD as input to NDA model of broaching in replacement of EFD inputs or by using CFD for complete simulation of broaching. The CFD resistance, static heel and drift in calm water and static heel in following wave simulations are conducted to estimate inputs for NDA and 6DOF simulation in following waves are conducted for complete modeling of broaching. CFD parametric rolling simulations show remarkably close agreement with EFD. The CFD stabilized roll angle is very close to those of EFD but CFD predicts larger instability zones. The CFD and EFD results are analyzed with consideration ship theory and compared with NDA. NDA predictions are in qualitative agreement with CFD and EFD. CFD and EFD full Fr curve resistance, static heel and drift in calm water, and static heel in following waves results show fairly close agreement. CFD shows reasonable agreement for static heel and drift linear maneuvering derivatives, whereas large errors are indicated for nonlinear derivatives. The CFD and EFD results are analyzed with consideration ship theory and compared with NDA models. The surge force in following wave is also estimated from Potential Theory and compared with CFD and EFD. It is shown that CFD reproduces the decrease of the surge force near the Fr of 0.2 whereas Potential Theory fails. The CFD broaching simulations are performed for series of heading and Fr and results are compared with the predictions of NDA based on CFD, EFD, and Potential Theory inputs. CFD free model simulations show promising results predicting the instability boundary accurately. CFD calculation of wave and rudders yaw moment explains the processes of surf-riding, broaching, and periodic motion. The NDA simulation using CFD and Potential Flow inputs suggests that CFD/Potential Flow can be considered as replacement for EFD inputs.
590 $a School code: 0096.
650 4 $a Naval engineering. $3 3173824
650 4 $a Mechanical engineering. $3 649730
653 $a Broaching
653 $a Nonlinear dynamics
653 $a Parameric rolling
653 $a Ship capsize
653 $a Surf-riding
690 $a 0468
690 $a 0548
710 2 $a The University of Iowa. $b Mechanical Engineering. $3 1683754
773 0 $t Dissertations Abstracts International $g 71-09B.
790 $a 0096
791 $a Ph.D.
792 $a 2009
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3390201