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Study on Nonlinear Stochastic Process of Deck Slamming on Floating Offshore Platform

Authors
Nam, Hyun-SeungKim, Yonghwan
Issue Date
2월-2021
Publisher
MDPI
Keywords
nonlinear stochastic process; deck slamming; slamming occurrence; Hermite-moment method; joint probability distribution
Citation
PROCESSES, v.9, no.2, pp 1 - 18
Pages
18
Journal Title
PROCESSES
Volume
9
Number
2
Start Page
1
End Page
18
URI
https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/8303
DOI
10.3390/pr9020231
ISSN
2227-9717
2227-9717
Abstract
In this paper, a semi-analytic method is introduced to predict the deck-slamming probability and corresponding loads. This method is based on a nonlinear statistical approach that takes into account the linear and second-order components of the relative wave elevation up to the second order. The linear and second-order wave elevation is assumed to be a two-term Volterra series. The joint probability density function of the relative wave elevation and velocity are formulated using the Hermite-moment method, and the probability distributions of the wave crest and relative wave velocity are calculated. These probability distributions are verified using the data sampled from the linear and second-order relative wave elevation. Based on this formulation, the probabilities of deck slamming and slamming-induced loads are estimated. This method is applied to a tension leg platform (TLP) model, and the effects of the second-order component of the relative wave elevation on the deck slamming are investigated.
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