contributor author | Ravikiran S. Kota | |
contributor author | Torgeir Moan | |
date accessioned | 2017-05-09T00:40:19Z | |
date available | 2017-05-09T00:40:19Z | |
date copyright | November, 2010 | |
date issued | 2010 | |
identifier issn | 0892-7219 | |
identifier other | JMOEEX-28366#041302_1.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/144572 | |
description abstract | Level-crossing analysis of long-crested, Gaussian waves in space and time are studied in the context of wave loads on a fixed, horizontal deck-box above mean waterline. Vertical wave loads on decks due to insufficient airgap are a major concern for many in-service platforms. Reliable estimation of magnitude and duration of these loads is important in assessing structural and global response of an offshore platform. In the case of an irregular wave-impact on a flat deck of dimensions comparable to mean wavelength of the incident waves, both temporal and spatial variability of wave-kinematics need to be considered during the deck-wetting process. In the present study, we have used a multidimensional Gaussian formulation of incident wave-kinematics to derive a joint probability density function of deck-wetting (or exceedance) duration and its spatial extent. We have also derived a probability density function for initial slam force on deck. A numerical scheme for simulating wave-impact events on a two-dimensional deck is discussed, results from which are compared against corresponding analytical estimates. Vertical force on deck was estimated using the momentum method, which includes a von Kármán slamming model applied over the wetted-length determined from an undisturbed wave profile. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | Gaussian Analysis of an Irregular Wave Impact on Deck | |
type | Journal Paper | |
journal volume | 132 | |
journal issue | 4 | |
journal title | Journal of Offshore Mechanics and Arctic Engineering | |
identifier doi | 10.1115/1.4001436 | |
journal fristpage | 41302 | |
identifier eissn | 1528-896X | |
tree | Journal of Offshore Mechanics and Arctic Engineering:;2010:;volume( 132 ):;issue: 004 | |
contenttype | Fulltext | |