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The effects of wave groups on the nonlinear simulation of ship motion in random seas

Historically, the analysis of ship motion and loading responses has been
performed in the frequency domain with both linear response amplitude operators and
wave energy density spectra. This method, therefore, did not account for the nonlinear
nature of waves. A more precise method is to obtain the response in the time domain,
processing non-linear wave data with a linear response amplitude operator. Since the
input is non-linear, even though the system is linear, the output will also be non-linear.
This resultant data can then be used to generate a more accurate design of seaworthy
vessels. Furthermore the linear frequency domain method does not account for the
presence or effects of wave groups. This study shows the improved accuracy in the
response obtained by accounting for non-linearities and furthermore indicates that wave
groups affect the vertical relative motion of a moored ship (zero-speed).

Identiferoai:union.ndltd.org:tamu.edu/oai:repository.tamu.edu:1969.1/3202
Date12 April 2006
CreatorsRicher, Jeffrey A.
ContributorsKim, Cheung Hun
PublisherTexas A&M University
Source SetsTexas A and M University
Languageen_US
Detected LanguageEnglish
TypeBook, Thesis, Electronic Thesis, text
Format1949067 bytes, electronic, application/pdf, born digital

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