Showing papers on "Wave flume published in 1981"
TL;DR: In this paper, the effects of wave flume and wavemaker geometry on the minimum inertial wave pressure moment on the wavemaker flap better than tabular lookup methods are examined.
Abstract: Dimensionless theoretical design curves for hinged wavemakers of variable draft are extended, within the limits of linearized potential wave theory, to wave flume geometries consisting of two constant depth domains separated by a gradually sloping transition region. These design curves are examined for the following: hydrodynamic pressure moment, moment arm, relative moment phase angle, and the ratio of the wavemaker stroke to the propagating wave height. The dimensionless design curves are shown to demonstrate the effects of wave flume and wavemaker geometry on the minimum inertial wave pressure moment on the wavemaker flap better than tabular lookup methods. The effects of nondimensional wavemaker parameters on the dimensionless wavemaker power curves are explored, and they are compared to the energy flux in a propagating periodic wave. Convergence of the eigenfunction expansion for the wavemaker velocity for hinged wavemakers of variable depth is examined numerically.
10 citations
TL;DR: In this article, the authors compared experimental data measured in large-scale wave flume (for the dimensionless wavemaker gain function and for the magnitude and phase angle for the hydrodynamic pressure moment on a hinged wavemaker) with theoretical values computed from dimensionless design curves derived from linear wave theory.
Abstract: Experimental data measured in large-scale wave flume (for the dimensionless wavemaker gain function and for the magnitude and phase angle for the dimensionless wavemaker hydrodynamic pressure moment on a hinged wavemaker) are compared with theoretical values computed from dimensionless design curves which are derived from linear wave theory. Dimensionless relative errors between experimental and theoretical values are tabulated for 21 discrete wave frequencies in each of two water depths. These dimensionless relative errors provide comparisons for over one decade of dimensionless relative water depth which cover both intermediate- and deep-water wave conditions for wave heights which are approx. 25% of the theoretical breaking limit. While measured data from smaller scale wave flumes have been previously published for the dimensionless wavemaker gain function, S/H, the measured hydrodynamic pressure moment data appear to be unique.
8 citations
TL;DR: In this article, a 58.04m wave flume has been constructed and calibrated, and a series of tests performed to verify design curves presented by Gilbert, Thompson, and Brewer show good agreement with the predicted values.
Abstract: A 58.27 × 4.57 × 3.04 m wave flume has been constructed and calibrated. The maximum wave height that can be generated in regular waves is 0.7 m at a water depth of 1.8 m. Random wave spectra have also been modelled in the flume for prototype wind speeds up to 25 m/s. The maximum significant wave height that can be generated at a 1 m water depth is 20 cm.A series of tests performed to verify design curves presented by Gilbert, Thompson, and Brewer show good agreement with the predicted values. The Pierson-Moskowitz spectrum was modelled between wind speeds of 5 and 25 m/s at suitable scale factors ranging from 1:50 to 1:150. All analysis was carried out in real time by means of an on-line computer.
3 citations
TL;DR: In this article, the authors describe the results of model random wave tests (without consideration of angular spreading) performed to estimate the design waves for the design of a breakwater and the result of model stability tests on caissons.
3 citations
TL;DR: In this paper, the deterministic wave and current-induced hydrodynamic loadings on sea-based structures are reviewed, which does not include geotechnical, surface, or installational/operational forces.
Abstract: The deterministic wave- and current-induced hydrodynamic loadings on sea-based structures are reviewed. This state-of-the-art review does not include geotechnical, surface, or installational/operational forces. Wave-induced loadings in both the small member (Morison equation) and large member (diffraction) regimes of wave force computations are reviewed. The selection of appropriate water wave theories and hydrodynamic force coefficients is included. The effects of laboratory facilities on the evaluation of the hydrodynamic force coefficients for periodic flows are also considered.
3 citations