Showing papers in "Ocean Engineering in 1996"

TL;DR: In this article, the authors developed the full second-order wavemaker theory (including superharmonics as well as subharmonics) valid for rotational and translatory wave board motion.

TL;DR: In this article, a formal derivation of the improved Boussinesq equations of Madsen and Sorens (1992) is presented to provide the correct forms of the depth-gradient related terms.

TL;DR: In this article, two mathematical models are employed, respectively the Reynolds Averaged Navier Stokes Equations (RANSE) and the shallow water equation (SWE), for the analysis of sloshing of water in rectangular open tanks.

TL;DR: In this paper, a method for analysis of the structural damage due to ship collisions is developed, based on the idealized structural unit method (ISUM), where longitudinal/transverse webs which connect the outer and inner hulls are modelled by rectangular plate units.

TL;DR: In this paper, the authors present various theoretical approaches to estimate the maximum wave height to water depth ratio for oscillatory waves propagating in water of constant depth, which is in good agreement with observations.

TL;DR: In this article, the effects of wave radiation stress on surge levels and storm-induced currents on waves are investigated by the dynamical coupling of a third generation wave model and a two-dimensional storm surge model.

TL;DR: In this article, a data set consisting of observations of significant wave height and wind speed within mature hurricanes has been obtained from the GEOSAT satellite mission, and the data are presented in terms of a relatively simple parametric hurricane wave model.

TL;DR: In this paper, the fundamental frequencies of vibration of the structural elements as determined by the methodologies (a) and (c) are in excellent agreement while rather considerable discrepancies are found when using the differential quadrature technique.

TL;DR: In this article, the authors used the least squares fitting of the stationary numerical solution of the nonlinear rolling motion differential equation to obtain informations on the damping model and on the linear and nonlinear damping coefficients.

TL;DR: In this paper, a quasi-non-linear time-domain technique has been developed to investigate the large amplitude motions of catamarans in regular waves, and numerical results obtained from the linear and nonlinear strip methods have been compared with those obtained from a series of experiments carried out in the towing tank of the Hydrodynamics Laboratory at the University of Glasgow.

TL;DR: In this article, the wave-induced response in a soil matrix, with variable permeability as a function of burial depth, is investigated in an unsaturated and anisotropic soil matrix.

TL;DR: In this paper, a scheme for the assimilation of wave height data into a second generation wave prediction model is developed, which modifies the model wave spectrum so as to be consistent with the satellite observed values of significant wave height.

TL;DR: In this paper, a time domain model to predict the dynamic response of a semi-submersibles is developed and the effect of thrusters and mooring line damping are incorporated into the model.

TL;DR: In this paper, an analytical model is proposed for predicting the dynamics of instrumented oceanographic surface moorings made up of a combination of wire rope and compliant synthetic rope, which is based on a coefficient of friction equal to 0.003 which fits the experimental data best.

TL;DR: In this article, a long submerged horizontal circular cylinder of.90 m diameter was assembled off the beach at Reggio Calabria where the wind waves typically have significant height ranging within 0.20 and 0.40 m and dominant period within 1.8 and 2.6 s.

TL;DR: In this article, the wave-induced second-order stress is a linear function of elevation and depends on the wave parameters, the current strength and the angle between the waves and the current.

TL;DR: In this paper, a hybrid wave model incorporating non-linear wave component interactions, and its wave evolution predictions and kinematics estimates are compared with laboratory measurements in the field of physics.

TL;DR: In this paper, the control signal for the wave board has been derived with the perturbation method of multiple scales, which is much less complex and requires less computation time than the expressions obtained from the full second-order theory.

TL;DR: In this paper, the effectiveness of single floating booms, and series of barriers in preventing oil slick and jellyfish movement under various current, wind, and wave conditions was evaluated.

TL;DR: In this paper, a frequency response function approach was used for modeling the interaction between waves and an offshore platform, where the dynamic properties of the wave and structure must be considered together to determine the similitude parameters.

TL;DR: In this article, a test program was carried out to study the migration of lime into the marine clay from the installed lime columns and lime slurry injected points and the formation of various cementation compounds due to soil-lime reactions were identified by X-ray diffraction studies and attributed changes occurring in the engineering properties of the soil systems were studied.

TL;DR: In this paper, a series of methods for deriving additional hull characteristics such as the length L, volume V, and offsets (x,z) from this spectral and surface wave information is presented.

TL;DR: In this article, a method to mitigate the vibration of an offshore structural system in the marine environment when subjected to the in-plane wave forces was described, and the analytical technique to evaluate the structural responses when the system is incorporated with damping devices.

TL;DR: In this article, a numerical solution for the title problem was obtained by means of the popular finite element method, and an experimental investigation of the problem was also presented for plates of square planform.

TL;DR: In this article, the authors compare the potential for injury as indicated with the IMO criteria and that obtained through use of the Hybrid III manikin, based on data obtained during prototype tests with full-scale free-fall lifeboats launched from heights of up to 30 m.

TL;DR: In this paper, a generalized potential theory is used to describe both the internal and external water flows, and the perturbation method was used to solve the problem analytically up to the second order.

TL;DR: In this paper, an analytical, computationally efficient method for the wave reflection and dynamic displacement of a submerged flexible breakwater is presented, where the solution of the two-dimensional linearized hydrodynamic problem introduced is based on the eigenfunction expansion technique.

TL;DR: In this article, the effect of the wave and the current on the bed roughness was investigated in the presence of waves with an arbitrary angle θ to currents, and a new formula was proposed to calculate the ks in combined wave-current flows.

TL;DR: In this article, a general method for calculating wave forces on the cylindrical members of offshore structures is presented, which is based on the linear Airy wave theory and can predict large amplitude oscillatory and steady motion characteristics of an intact and damaged platform in waves.