Showing papers on "Rogue wave published in 1986"

Hydrodynamics of ocean wave-energy utilization

Abstract: This book presents papers on wave energy converters. Topics considered include hydrodynamics, resonance, air turbines, buoys, physical and mathematical modeling, nonlinear damping, China's research on wave power, wave climate, site selection, wave forces, ship propulsion, wave energy absorption, phase control, optimal control, oscillating water columns, air flow, pneumatics, wave propagation, the survival of surface-piercing wave energy devices in extreme waves, and performance testing.

Extreme wave prediction using directional data

Abstract: Potential inconsistencies in the predictions of long term wave heights can be experienced as a result of different methods of analysis possible when using directional wave data. This paper attempts to illustrate some of them. It involves analysis of two sets of directional wave data - one froa a coastal location in the Irish Sea and another from an offshore location in the North Sea. An attempt is made to eliminate the discrepancies between the long term return-value wave height predictions based upon the conditional height distributions associa ted with different direction sectors and those derived from the oonl-directional data set.

Extreme Wave Groups in Storm Seas Near Coastal Water

Abstract: We discuss statistics of wave groups containing the maximal wave height over wave records of 20 minutes. These wave groups are called extreme wave groups (EWGs). The concept of the EWG combines the two previously separately considered design factors of extreme waves and wave groups into a more severe storm seas wave action. The wave data used in this investigation consists of near 540 records of wave staff measurements in the Gulf of Mexico. Specifically, we shall present (a) the dependence of EWG properties on the bandwidth of wave spectra, (b) the mean envelope shape of EWGs, exhibiting distinct differences from the envelope shape of regular basis.

Survival of Surface-Piercing Wave Energy Devices in Extreme Waves

Abstract: This paper extends and exploits a numerical method of calculation of the development of a wave approaching a fixed or moving body. The theory is strictly two-dimensional which implies that the body length is much greater than its breadth or depth, and that it lies parallel to the wave crests. Many wave energy devices of the terminator type, either mounted upon the sea bed or on rigid or flexible spines, satisfy these requirements and therefore the present method can be used to study their behaviour in extreme waves. This paper considers the general problem of forces and pressures on a circular spine section when exposed to a large wave, and also considers two specific examples, the “Clam” and an Oscillating Water Column (O.W.C.).