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Showing papers in "Applied Ocean Research in 2007"


Journal ArticleDOI
TL;DR: In this paper, the authors investigated the fully nonlinear regular and focused wave propagation and diffraction around a vertical circular cylinder in a numerical wave tank, where the mixed Eulerian-Lagrangian approach was used to update the moving boundary surfaces in a Lagrangian scheme, in which a higher-order boundary element method was applied to solve the wave field based on an Eulerians description at each time step.

110 citations


Journal ArticleDOI
TL;DR: In this article, SWAN and MIKE 21 SW third generation spectral models have been used for the prediction of wave parameters and the results show that the average scatter index of SWAN is about 16% for H s and 19% for T p ; while the average scattering index of MIKE21 SW is about 20% and 13% for h s and T p, respectively.

80 citations


Journal ArticleDOI
TL;DR: In this article, a hybrid Artificial Neural Network (ANN) and finite element method (FEM) is used to perform a nonlinear mapping of the current and past system excitations (inputs) to produce subsequent system response (output) for the random dynamic analysis of mooring lines and risers.

75 citations


Journal ArticleDOI
TL;DR: In this paper, the wave observations at three locations off the west coast of India have been analyzed using artificial neural network (ANN) to obtain forecasts of significant wave heights at intervals of 3, 6, 12 and 24 h.

75 citations


Journal ArticleDOI
TL;DR: In this article, the authors used bubble image velocimetry (BIV) to measure the velocity of green water on a two-dimensional simplified model structure and compared the results with the measurements obtained by Ritter's analytical solution for the dam break flow problem.

66 citations


Journal ArticleDOI
TL;DR: In this paper, Wang et al. investigated the influence of multiple interactions between the cylinders in the group on the hydrodynamic wave forces, wave run-up and free-surface elevation in their vicinity.

66 citations


Journal ArticleDOI
TL;DR: In this paper, a method for the prediction of extreme response statistics of floating offshore structures subjected to random seas by Monte Carlo simulation is described, taking into account both the first order, wave frequency and the second order, slow-drift motions.

66 citations


Journal ArticleDOI
TL;DR: In this paper, laboratory measurements of forces on three different net panels exposed to five different regular wave cases are also compared with simulations using three different load numerical models, and the results of laboratory measurements also need to be validated using the results from laboratory measurements.

63 citations


Journal ArticleDOI
TL;DR: In this paper, the effects of the wide range wave parameters and structure configuration including porosity of the exterior cylinder and the annular spacing on the wave forces, surface elevations and diffracted wave contours are examined.

59 citations


Journal ArticleDOI
TL;DR: In this paper, a fatigue combination rule based on the Jiao and Moan's theory has been extended to cover the nonGaussian case for estimating the combined fatigue damage of mooring lines in the frequency domain.

55 citations


Journal ArticleDOI
TL;DR: In this paper, a methodology to classify the wave spectra occurring at a given location in five different spectral types of shapes was proposed, and a numerical procedure was proposed to identify the various wave systems in complex spectra and to classify them in classes.

Journal ArticleDOI
TL;DR: In this paper, the problem of scattering of obliquely incident surface water waves by small undulation on a sea-bed is considered for solution by assuming that the bed is composed of porous material of a specific type.

Journal ArticleDOI
TL;DR: In this paper, the problem of restoring missing wave heights is attempted using one of the latest soft computing tools, namely, Genetic Programming (GP), and the performance of GP was judged in terms of the error statistics of bias, root mean square error, correlation coefficient and scatter index.

Journal ArticleDOI
TL;DR: In this article, a study of analyzing a waterfront retaining wall under the combined action of tsunami and earthquake forces is presented, where the stability of the wall is assessed in terms of its sliding and overturning modes of failure, and the factor of safety in sliding mode of failure decreases by about 70% when the ratio of tsunami water height to initial water height is changed from 0.375 to 1.125.

Journal ArticleDOI
TL;DR: In this paper, the response of an offshore structure exposed to Morison wave loading can be approximated by an equivalent finite-memory nonlinear system, which can then be used to determine the probability distribution of response extreme values with great efficiency.

Journal ArticleDOI
TL;DR: In this article, the dynamic response of a floating platform under the effects of impulsive and moving loads is studied in various areas of engineering technology, such as floating airports, floating bridges and buoyant tunnels, among others.

Journal ArticleDOI
TL;DR: In this article, two methods for assessing the inertial properties of bodies with complex geometries are proposed for the purpose of simulation of the offshore deployment of industrial modules in very deep water.

Journal ArticleDOI
TL;DR: In this article, the authors derived a correct formulation for the characteristic resistance of a mooring line segment with lognormally distributed component resistances and substitute an equation proposed by Vazquez-Hernandez et al. in a paper published in this journal, which is not correct.

Journal ArticleDOI
TL;DR: In this paper, a small-scaled planar platform has been modelled analytically using nonlinear finite element program, based on an experimental test, conducted simultaneously in order to assess the local and global behavior of pile-leg interaction in Jacket Type Offshore Platforms (JTOPs).

Journal ArticleDOI
TL;DR: In this paper, it was shown that the accuracy of common wave parameters remains acceptable up to a cut-off limit in the range of 0.30-0.35 Hz if the spectra above the cutoff frequency are replaced by a prognostic f − 5 tail.

Journal ArticleDOI
TL;DR: Truelsen et al. as discussed by the authors presented an approach by which the scour depth around a spherical body and the self-burial depth of such a body in random waves can be derived.

Journal ArticleDOI
TL;DR: In this article, an analytical model based on the method of matched asymptotics is developed in order to obtain the free surface oscillations in the channel, caused by a grazing incident wave.