Showing papers in "Ocean Engineering in 1978"

TL;DR: In this paper, the propagation of water waves over a deformable bottom is examined theoretically for the case where the soil beneath the water is regarded as an elastic solid, and the effects of soil inertia are included in the analysis, and it is shown that such effects cannot generally be ignored without committing serious error.

TL;DR: In this paper, a numerical solution and computer program developed to analyse undersea flexible cable problems is presented, where the cable is subject to hydrodynamic loads from a surrounding fluid medium.

TL;DR: In this article, a submerged apparatus consisting of a buoy, several horizontal contraction and expansion tubes (Venturi-type tubes) and a long pipe is used to pump the subsurface sea-water containing abundant nutrients to surface layer (50-100 m) by the dynamic of ocean currents.

TL;DR: In this article, measurements have been obtained from both wind tunnel and towing tank tests which explain the poor streaming behavior of certain proprietary cable fairings, which had caused severe towing difficulties at sea.

TL;DR: The applicability of chlorine to control Ocean Thermal Energy Conversion (OTEC) biofouling was investigated in this paper, where onsite hypochlorite generation was found to be the preferred method of chlorination.

TL;DR: In this paper, the authors made comprehensive measurements of the drag coefficients of both the body and the faired cable of a towed system, and the results were embodied in theoretical calculations of the depth attained in tow at speed up to 3 m s −1 (6 knots) with scopes up to 135 m (440 ft).

TL;DR: In this paper, a study of the coupled motions of yaw, sway, roll, and rudder of high-speed naval ships such as destroyers is presented, and it is concluded inter alia that asymmetry of the underwater hull, due to rolling, generates yaw moment, with a consequent tendency to turn towards one direction (e.g., to port) when the ship is heeled the other way (i.e., to starboard), so contributing to inherent yaw instability due to roll combined with other coupling terms.

TL;DR: In this paper, the authors examined near-surface current data from different periods during the test mooring of the data buoy, DB1, and concluded that this combination of surface following buoy and long-path acoustic current meter can contribute usefully to the determination of mean near surface currents in the open sea.

TL;DR: One of the major hostile elements to the oil drilling rig operators in this region is the threat of drifting icebergs as discussed by the authors, which has been the focal point of an extensive search for hydrocarbons in recent years.

TL;DR: In this paper, an experimental data buoy project which has been undertaken in the United Kingdom (DB1 Project) is described, where the displacements of drifting floats, tracked acoustically, were compared with the integrated output from the acoustic current meter: also a comparison with a buoy-mounted electromagnetic sensor.

TL;DR: In this paper, field tests conducted on a wave-power pump showed that this simple design conceived by Professor John D. Isaacs is suitable for wave-energy extraction around the Hawaiian Islands.

TL;DR: In this paper, a theoretical expression of the wave power striking a rectilinear array of wave energy convertion devices in a random sea is derived, and the theory is then applied to a linear array which is 1 km in length.

TL;DR: In this article, a linearized analysis of the response of an air cushion vehicle running in waves is described using the linear systems approach where the vehicle is considered to be a "black box" and the response characteristics are determined experimentally from input-output relationships.

TL;DR: In this paper, the authors extended the work in Magnuson (1977) to the supercritical frequency range and presented wave profiles for frequencies and speeds covering the operating range of air-cushion vehicles.

TL;DR: In this article, the authors discussed the possibility of reducing the number of mooring dolphins from four to two, based on studies for a proposed terminal for tankers from 25,000 to 100,000 DWT in the Bay of Fundy in Eastern Canada.

TL;DR: In this paper, a numerical simulation model is developed to investigate wave profiles and velocities in harbor channels, where the Galerkin Technique is coupled with the finite element method in the flow model.

TL;DR: In this paper, the problem of high speed hulls subjected to transient dynamic loads, specifically those associated with ship hydrodynamic impact, was studied, as these are usually the critical seaway induced dynamic loads in the design of high-speed ships.

TL;DR: In this paper, a sighting device called a "probe sight" is described which simplifies the measurement, taken, from a helicopter, of the float separations from a deployed expendable surface current probe.

TL;DR: In this paper, the authors performed experiments on a flat plate with a transverse suction slit in the Reynolds number range 5 × 10 5 R e 6, where the mean velocity profiles, RMS values are measured with hot wire anemometry.

TL;DR: In response to the deleterious results of many years of imprudent development along Florida's beachfront areas, the Florida Legislature authorized Coastal Construction Set-Back Lines as discussed by the authors.