Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 106 for “"ocean waves"”.
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Models for ocean waves
Ocean waves represent an important design factor in many coastal engineering applications. Although extreme wave height is usually considered the single most important of these factors there are other important aspects that require consideration. These include the probability distribution of wave …
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Antarctic tabular icebergs in ocean waves
… We show that tabular icebergs respond to ocean waves of medium (15-30 s) and long (>30 s) periods, but that they act as filters to very short (<10 s) period waves. A two-dimensional, linear model of rigid body motions, including hydrodynamical effects of added mass and damping and the …
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Observations of particle motions in ocean waves.
Massachusetts Institute of Technology. Dept. of Meteorology. Thesis. 1966. Sc.D.
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On the interaction of ocean waves and turbulence
The interaction of ocean waves and turbulence is a fundamental process in the ocean. Understanding and prediction of wind-wave generation, propagation, breaking, non-linear interactions and extreme wave development are directly linked to this complex and not well understood phenomenon (Thorpe …
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Dynamics of Ocean Waves in a Continuous Sea Ice Cover
Waves and swell incident on a continuous cover of sea ice can become coupled to the ice and propagate as flexural-gravity waves. These ice-coupled waves are determined by a dispersion equation and attenuation coefficient which depend critically on the material properties of the sea ice. Two models …
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Experimental and Theoretical Study of Motion of a Barge as Moored in Ocean Waves
Made available in DSpace on 2014-12-08T23:56:52Z (GMT). No. of bitstreams: 1 6711888.pdf: 10633261 bytes, checksum: 46f1eee3ecf4bfc63c1ef26fa634315c (MD5) Previous issue date: 1967
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A drifter-based self-powered piezoelectric sensor for ocean wave measurements
… piezoelectric sensor is proposed to measure ocean waves’ height and period. To analyze the motion principle and the working performance of the proposed drifter-based piezoelectric sensor, a dynamic model is developed. The developed dynamic model investigates the system’s response to an input …
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Link Stability Analysis of Wireless Sensor Networks Over the Ocean Surface
Ocean-surface Wireless Sensor Networks (WSN) are essential in various thalassic applications, such as maritime communication, ocean monitoring, seawater examination, pollution detection, etc. Formed by simple structured sensor nodes, ocean-surface WSN can improve the data transmission rate, enhance …
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Dynamic system design optimization of wave energy converters utilizing direct transcription
… a device that captures energy present in ocean waves. This system is of particular interest since a successful design hinges on exploiting the natural dynamics of the interaction between the ocean waves and the physical wave energy converter. A number of numerical studies are presented …
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A harmonic balance framework for the numerical simulation of non-linear wave energy converter models in random seas
… understanding of the statistical properties of ocean waves, which constitute the forcing inputs to the wave energy device, and computationally efficient numerical techniques for the speedy calculation of WEC outputs. This thesis studies the statistical characterisation, and numerical generation, …
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Boat-shaped Buoy Optimization of an Ocean Wave Energy Converter Using Neural Networks and Genetic Algorithms
… absorber is one of the most popular types of ocean wave energy converter (WEC) that harvests energy from the ocean. Often such a WEC is deployed in an ocean location with tidal currents or ocean streams, or serves as a mobile platform to power the blue economy. The shape of the floating body, …
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Machine learning in ocean applications : wave prediction for advanced controls of renewable energy and modeling nonlinear viscous hydrodynamics
Many conventional problems in ocean engineering remain challenging due to the stochastic nature of ocean waves, viscous effects of the flow, nonlinear resonance, etc., and the combination of these factors. Data-driven techniques is an prospective approach complementary to traditional methods to …
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Design, validation and application of wave-to-wire models for heaving point absorber wave energy converters
Ocean waves represent an untapped source of renewable energy which can significantly contribute to the energy transition towards a sustainable energy mix. Despite the significant potential of this energy source and the multiple solutions suggested for the extraction of energy from ocean waves, some …
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Ocean Wave Simulation and Prediction
… broadband connectivity for users on the sea. Ocean wave simulation and prediction are key technologies in developing marine mesh network, because marine environments are dramatically different from terrestrial environment. The ocean waves have characteristics of rhythmic oscillations and the …
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Triad Interactions among Surface Waves Propagating through an Ice Sheet
… resonant wave-wave interactions which occur when ocean waves propagate into a thin floating ice sheet. Using multiple-scale perturbation analysis verified against regular perturbation for short distances past the ice edge, we obtain theoretical predictions of the wave amplitude evolution as a …
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Nonlinear hydrodynamic modelling of wave energy converters under controlled conditions
… reduce the human footprint on the environment. Ocean energy, including energy generated from the motion of wave, is a tremendous untapped energy resource that could make a decisive contribution to the future supply of clean energy. However, numerous obstacles must be overcome for ocean energy to …
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Performance Analysis and Tank Test Validation of a Hybrid Wave-Current Energy Converter with a Single Power Takeoff
Marine and hydrokinetic (MHK) energy, including ocean waves, tidal current, ocean current and river current, has been recognized as a promising power source due to its full-day availability and high energy potential. At this stage, ocean current energy, tidal energy and ocean wave energy are …
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Plan-view evolution of wave-dominated deltas
Ocean waves are a powerful sediment transport mechanism in the coastal zone. This thesis investigates how waves shape deltaic landforms and how small scale river mouth processes affect large-scale delta morphology. I have developed and applied models of plan-view delta shape and their channel …
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Damping estimation, response prediction and fatigue calculation of an operational single pile platform
… which utilizes the principle of reciprocity of ocean waves. The result is a versatile expression for the estimation of the dynamic response fatigue life of a platform in a directionally spread sea. In addition, the data analysis performed on wind, wave and response time histories, recorded in …
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Plan-view evolution of wave-dominated deltas
Ocean waves are a powerful sediment transport mechanism in the coastal zone. This thesis investigates how waves shape deltaic landforms and how small scale river mouth processes affect large-scale delta morphology. I have developed and applied models of plan-view delta shape and their channel …
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