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  4. Theoretical estimation of roll acceleration in beam seas using PDF line integral method
 
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Theoretical estimation of roll acceleration in beam seas using PDF line integral method

Publikationstyp
Journal Article
Date Issued
2021-09
Sprache
English
Author(s)
Maki, Atsuo  
Dostal, Leo  
Maruyama, Yuuki  
Sakai, Masahiro  
Sugimoto, Kei  
Fukumoto, Yusuke  
Umeda, Naoya  
Institut
Mechanik und Meerestechnik M-13  
TORE-URI
http://hdl.handle.net/11420/7539
Journal
Journal of marine science and technology  
Volume
26
Issue
3
Start Page
828
End Page
834
Citation
Journal of Marine Science and Technology 26 (3): 828-834 (2021-11)
Publisher DOI
10.1007/s00773-020-00770-1
Scopus ID
2-s2.0-85091727840
The prevention of excessive roll acceleration is one of the fundamental requirements of an oceangoing vessel at sea. In this paper, aiming at this requirement, we propose a new theoretical method for calculating roll angular acceleration, called “PDF line integral method.”. This paper presents the derivation of this method and a numerical comparison with Monte Carlo simulation (MCS) results; also, its validity is shown. Although the utilized GZ curve (restoring curve) exhibits strong asymmetricity, the proposed method can provide for such a condition. With only the information of roll and roll rate joint probability density function (PDF), this method can approximately calculate the roll angular acceleration, which is a high-order differential property. In addition, a relatively good agreement is achieved between the theory and MCS results.
Subjects
Excessive acceleration
Irregular beam Seas
PDF line integral method
Roll angular acceleration
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