The papers which follow were presented at an International Sym posium held in Lisbon from 8-11 July 1985 on the Hydrodynamics of Ocean Wave-Energy Utilization and sponsored by the Interna tional Union of Theoretical and Applied Mechanics. The subject of the Symposium embraced wave statistics, numerical methods, theoretical, experimental and field studies of wave energy devices. The idea of extracting useful energy from ocean waves continues to attract the curiosity of scientists and engineers in many parts of the world as the following papers indicate. Increasing ly the trend is towards smaller devices suitable for use near remote island communities where wave power, as an alternative to costly diesel fuel for electric generators, is already very competitive in economic terms. The decision to build two different prototype wave-power devices into the cliffs off Bergen in Norway has provided a welcome impetus to the field, stimulating a large amount of theoretical work on oscillating water column-type devices. In particular phase control methods - in which force and velocity of a rigid body, or pressure and volume flux across a turbine are matched in phase to achieve maximum power output - rightfully occupy a central place in the papers that follow. In addition to the established workers in the field, a new ge neration of wave-energy enthusiasts is emerging, learning from the mistakes of others and contributing exciting ideas of both a conceptual and practical nature.

Klappentext

The papers which follow were presented at an International Sym­ posium held in Lisbon from 8-11 July 1985 on the Hydrodynamics of Ocean Wave-Energy Utilization and sponsored by the Interna­ tional Union of Theoretical and Applied Mechanics. The subject of the Symposium embraced wave statistics, numerical methods, theoretical, experimental and field studies of wave­ energy devices. The idea of extracting useful energy from ocean waves continues to attract the curiosity of scientists and engineers in many parts of the world as the following papers indicate. Increasing­ ly the trend is towards smaller devices suitable for use near remote island communities where wave power, as an alternative to costly diesel fuel for electric generators, is already very competitive in economic terms. The decision to build two different prototype wave-power devices into the cliffs off Bergen in Norway has provided a welcome impetus to the field, stimulating a large amount of theoretical work on oscillating water column-type devices. In particular phase control methods - in which force and velocity of a rigid body, or pressure and volume flux across a turbine are matched in phase to achieve maximum power output - rightfully occupy a central place in the papers that follow. In addition to the established workers in the field, a new ge­ neration of wave-energy enthusiasts is emerging, learning from the mistakes of others and contributing exciting ideas of both a conceptual and practical nature.

Inhalt
The Hydrodynamic Efficiency of Wave-Energy Devices.- Progress on Edinburgh Ducks.- TAPCHAN.- Development of the Kvaerner Multiresonant OWC.- The Circular Sea Clam Wave Energy Converter.- Optimization of Wave Energy Absorber of an Attenuator OWC Device with an Air Turbine.- On the Experimental Investigation of a Wave Power Converter.- Design Optimization of Axi-symmetric Tail Tube Buoys.- Physical and Mathematical Modelling of a Point Absorber Wave Energy Conversion System with Nonlinear Damping.- Progress in China's Developmental Research on Wave Energy.- Wave climate and the wave power resource.- Wave Power Climate of Portugal.- Oceanographic Design Criteria and Site Selection for Ocean Wave Energy Conversion.- Accuracy of the Estimate of Extreme Wave Conditions.- On-line Identification and Prediction of Waves.- Extreme Wave Heights along the Norwegian Coast.- Wave Forces on a Horizontal, Submerged, Spinning Cylinder.- The Concept of a Bipartite Point Absorber.- Thrust Generation by a Hydrofoil Driven by Waves A Basic Aspect of Wave Devouring Propulsion.- Wave Energy Absorption Characteristics of Circular Air-Chamber for Use of Light Beacon Fixed on Sunken Rock.- Heaving Point Absorbers Reacting against an Internal Mass.- Phase Control for the Oscillating Water Column.- Wave Energy Absorption in Irregular Waves by Feedforward Control System.- Latching Control of an Oscillating Water Column Device with Air Compressibility.- Increase in Absorbed Wave Energy by the Phase Control for Air Flow on OWC Wave Power Device.- Simulation of a Pneumatic Wave-Power Buoy with Phase Control.- Dynamic Response and Input Adaptive Maximum Energy Converting Control of an Ocean Wave Energy Converter.- A Comparative Evaluation of Numerical Methods in Free-Surface Hydrodynamics.-Survival of Surface-Piercing Wave Energy Devices in Extreme Waves.- Progress on Flap-type Wave Absorbing Devices.- Three-Dimensional Analysis of Oscillating-Water-Column Terminator Devices in Obliquely Incident Waves.- Hydrodynamic Analysis and Design Method of OWC Wave Energy Convertors.- Wave Interaction with Oscillating Bodies and Water Columns.- The Radiation and Scattering of Long Water Waves.- Investigation of Wave Focusing over a Parabolic Step.- An Experience of Wave Power Generator through Tests and Improvement.