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Journal articles on the topic 'Wave buoy'

Author: Grafiati

Published: 4 June 2021

Last updated: 7 February 2022

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1

Wang, Jiuke, Lotfi Aouf, Xianqiao Wang, Benxia Li, and Juanjuan Wang. "Remote Cross-Calibration of Wave Buoys Based on Significant Wave Height Observations of Altimeters in the Northern Hemisphere." Remote Sensing 12, no. 20 (2020): 3447. http://dx.doi.org/10.3390/rs12203447.

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Consistency between national wave buoy networks is extremely important for wave climate studies and verification of global operational wave forecasting systems; however, it is insufficiently investigated. The validation of altimeter significant wave heights (SWHs) with the wave buoy networks of China, Europe and the National Data Buoy Center (NDBC) show significant divergence in assessments. This reveals a negative bias and larger root mean square error and scatter index from the Chinese buoy network than from the European and NDBC buoy networks. A remote cross-calibration method is presented

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2

Zhang, Li Zhen, Mao Yuan E, Shi Ming Wang, and Yong Cheng Liang. "Feasibility Analysis on Oscillating Buoy Wave Power Device for Ocean Buoy." Applied Mechanics and Materials 291-294 (February 2013): 606–9. http://dx.doi.org/10.4028/www.scientific.net/amm.291-294.606.

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When the oscillating buoy wave power device installed on the ocean buoy, the floater and the ocean buoy move up and down under the action of the waves. Therefore, whether there is a vertical relative displacement between the floater and the ocean buoy becomes a crucial problem of the wave power generation. Based on the wave theory, taking the vertical cylinder floater for example, introduced the wave force and the moving displacement of the floater，the relative displacement between the floater and three different sizes of ocean buoys under four different oceanic conditions was analyzed by MATL

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3

McAllister, M. L., and T. S. van den Bremer. "Experimental Study of the Statistical Properties of Directionally Spread Ocean Waves Measured by Buoys." Journal of Physical Oceanography 50, no. 2 (2020): 399–414. http://dx.doi.org/10.1175/jpo-d-19-0228.1.

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AbstractWave-following buoys are used to provide measurements of free surface elevation across the oceans. The measurements they produce are widely used to derive wave-averaged parameters such as significant wave height and peak period, alongside wave-by-wave statistics such as crest height distributions. Particularly concerning the measurement of extreme wave crests, these measurements are often perceived to be less accurate. We directly assess this through a side-by-side laboratory comparison of measurements made using Eulerian wave gauges and model wave-following buoys for randomly generate

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4

Hisaki, Yukiharu. "Validation of Drifting Buoy Data for Ocean Wave Observation." Journal of Marine Science and Engineering 9, no. 7 (2021): 729. http://dx.doi.org/10.3390/jmse9070729.

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Drifting buoys collect wave data in the open ocean far from land and in areas with strong currents. However, the validation of the drifting buoy wave data is limited. Here, we compared the drifting buoy wave data, ERA5 wave data, and moored GPS buoy wave data. Data from 2009 to 2018 near the coast of Japan were used. The agreement of the drifting buoy-observed wave parameters with the moored GPS buoy-observed wave parameters is better than that of ERA5 wave parameters, which is statistically significant. In particular, the accuracy of the ERA5 wave heights tends to be lower where the ocean cur

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Song, Qiu Hong, Xin Tang, Ya Mei Lan, and Yong Cheng Liang. "Design of Ocean Data Buoys Based on CFD." Advanced Materials Research 163-167 (December 2010): 2441–44. http://dx.doi.org/10.4028/www.scientific.net/amr.163-167.2441.

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Ocean Data Buoy with fixed-point, real-time, long-term, continuous and accurate data collection capabilities is a modern ocean observing tools and instruments. Therefore, the reliability of information is essential, which depends on the stability of the working buoy. While the waves are acting, the buoys are difficult to maintain their stability. Based on Computational Fluid Dynamics, the force situations of buoy at wave conditions are simulated by using Variable Operating Frequency method and Fluent software. The variation of lift and drag forces and the changing trend of movement of buoy are

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6

McCormick, Michael E., Robert C. Murtha, and Jeffrey Steinmetz. "Wave Energy Conversion for Shoreline Protection." Marine Technology Society Journal 47, no. 4 (2013): 187–92. http://dx.doi.org/10.4031/mtsj.47.4.1.

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AbstractThis paper is based on the premise that “wave energy conversion” is the conversion of the energy of ocean waves into other energy forms for the benefit of the environment. By taking advantage of the diffraction focusing phenomenon, commonly associated with water wave energy conversion, a bimodal buoy called the Antenna Buoy has been developed to both attract and dissipate incident water wave energy. As a result, arrays of the buoy can be deployed to form an effective floating breakwater system. Results from a full-scale experimental study show that an array of buoys, with each buoy pai

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Durrant, Tom H., Diana J. M. Greenslade, and Ian Simmonds. "Validation of Jason-1 and Envisat Remotely Sensed Wave Heights." Journal of Atmospheric and Oceanic Technology 26, no. 1 (2009): 123–34. http://dx.doi.org/10.1175/2008jtecho598.1.

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Abstract Satellite altimetry provides an immensely valuable source of operational significant wave height (Hs) data. Currently, altimeters on board Jason-1 and Envisat provide global Hs observations, available within 3–5 h of real time. In this work, Hs data from these altimeters are validated against in situ buoy data from the National Data Buoy Center (NDBC) and Marine Environmental Data Service (MEDS) buoy networks. Data cover a period of three years for Envisat and more than four years for Jason-1. Collocation criteria of 50 km and 30 min yield 3452 and 2157 collocations for Jason-1 and En

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Lai, Wenbin, Yonghe Xie, and Detang Li. "Numerical Study on the Optimization of Hydrodynamic Performance of Oscillating Buoy Wave Energy Converter." Polish Maritime Research 28, no. 1 (2021): 48–58. http://dx.doi.org/10.2478/pomr-2021-0005.

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Abstract The oscillating buoy wave energy converter (OBWEC) captures wave energy through the undulating movement of the buoy in the waves. In the process of capturing wave energy, the hydrodynamic performance of the buoy plays an important role. This paper designed the “Haida No. 1” OBWEC, in which the buoy adopts a form of swinging motion. In order to further improve the hydrodynamic performance of the buoy, a 2D numerical wave tank (NWT) model is established using ADINA software based on the working principle of the device. According to the motion equation of the buoy in the waves, the influ

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9

Helmreich, Stefan. "Reading a Wave Buoy." Science, Technology, & Human Values 44, no. 5 (2019): 737–61. http://dx.doi.org/10.1177/0162243919856095.

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The ocean’s properties and processes are now mostly known through distributed sensor networks. Among the most widespread of such networks are those that connect wave-measuring buoys. Buoys have been deployed and consulted by national meteorological organizations, state militaries, multinational corporations, and citizens. This paper zeroes in on the Directional Waverider, the most widely used buoy, manufactured since 1961 in the Netherlands by Datawell. I am interested in this buoy’s material qualities and networks of use, its life within legal frameworks, and its media ecology. Staging my acc

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10

Li, Jian-Guo, and Martin Holt. "Comparison of Envisat ASAR Ocean Wave Spectra with Buoy and Altimeter Data via a Wave Model." Journal of Atmospheric and Oceanic Technology 26, no. 3 (2009): 593–614. http://dx.doi.org/10.1175/2008jtecho529.1.

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Abstract The Advanced Synthetic Aperture Radar (ASAR) on board the Envisat satellite is an important resource for observation of global ocean surface wave spectra. However, assessment of this valuable dataset is not straightforward as a result of a lack of other independent ocean wave spectral observations. The radar altimeter (RA-2) on board the same satellite measures ocean wave height at the same time as the ASAR but at a location about 200 km distant. A small number of moored buoys produce one-dimensional (1D) ocean wave spectra but few ASAR spectra fall on the buoy positions in a given pe

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11

Zhang, Xiaoxia, Qiang Zeng, and Zhen Liu. "Hydrodynamic Performance of Rectangular Heaving Buoys for an Integrated Floating Breakwater." Journal of Marine Science and Engineering 7, no. 8 (2019): 239. http://dx.doi.org/10.3390/jmse7080239.

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Recently, the integrated development of wave energy converters and breakwaters has become popular, moving from traditional passive wave absorption to active energy capture. In this study, rectangular heaving buoys are considered as floating breakwater modules to absorb wave energy. A numerical wave tank is established based on Reynolds Averaged Navier-Stokes equation and User-Define-Function in ANSYS-Fluent commercial software. The numerical results show that incident wave conditions and submerged depth have significant effects on the heaving performance and wave energy absorption of a rectang

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Wilson, W. Brett. "Data Buoy Aerodynamics." Marine Technology and SNAME News 30, no. 01 (1993): 51–60. http://dx.doi.org/10.5957/mt1.1993.30.1.51.

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The National Data Buoy Center (NDBC) operates moored data buoys in waters around the United States, providing highly valuable environmental observations in real time from remote marine regions. Key among these observations are wind speed and direction, and, for that purpose, NDBC uses duplicate anemometers on each buoy for reasons of redundancy and data quality. A significant portion of the NDBC buoy array also measures the directional wave spectrum. Buoys so equipped, when also fitted with a fin on the mast, can produce wind speed and direction from the directional wave system output; however

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Qi, Zhanhui, Shaowu Li, Mingbing Li, et al. "Research on the Algorithm Model for Measuring Ocean Waves Based on Satellite GPS Signals in China." Sensors 19, no. 3 (2019): 541. http://dx.doi.org/10.3390/s19030541.

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In recent years, the GPS wave buoy has been developed for in situ wave monitoring based on satellite GPS signals. Many research works have been completed on the GPS-based wave measurement technology and great progress has been achieved. The basic principle of the GPS wave buoy is to calculate the movement velocity of the buoy using the Doppler frequency shift of satellite GPS signals, and then to calculate the wave parameters from the movement velocity according to ocean wave theory. The shortage of the GPS wave buoy is the occasional occurrence of some unusual values in the movement velocity.

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14

KAYODE, OLAKUNLE, TITUS OLUWASUJI AJEWOLE, and OLUFEMI ADEBOLA KOYA. "EXPERIMENTAL INVESTIGATION OF A CONCEPT WAVE ENERGY CONVERTER FOR HARNESSING LOW AMPLITUDE SEA WAVES." Journal of Engineering Studies and Research 26, no. 3 (2020): 97–106. http://dx.doi.org/10.29081/jesr.v26i3.211.

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This paper presents the results from experimental validation of numerical simulation of a concept wave energy converter for low amplitude sea waves. The device was conceived to contain a wave amplifying device (WAD) to magnify the wave height of incident waves while point absorber buoy(s) efficiently harness the wave energy for electricity production. The validation results show that the optimum aperture angle for the WAD is 45±2 degree, and wave height magnification of 170% is possible. The optimal buoy shape for the device was confirmed as concave wedge buoy. The combination of the two in a

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15

Collins, Clarence O., Björn Lund, Rafael J. Ramos, William M. Drennan, and Hans C. Graber. "Wave Measurement Intercomparison and Platform Evaluation during the ITOP (2010) Experiment." Journal of Atmospheric and Oceanic Technology 31, no. 10 (2014): 2309–29. http://dx.doi.org/10.1175/jtech-d-13-00149.1.

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Abstract Spectral wave parameters from 11 platforms, measured during the recent Impact of Typhoons on the Ocean in the Pacific (ITOP) experiment, are intercompared. Two moorings, separated by ~180 km, were deployed in a section of “typhoon alley” off the coast of Taiwan for 4 months. Each mooring consisted of an Air–Sea Interaction Spar (ASIS) buoy that was tethered to a moored Extreme Air–Sea Interaction (EASI) buoy. EASI, the design of which is based on the hull of a 6-m Navy Oceanographic Meteorological Automatic Device (NOMAD) buoy, is validated as a 1D wave sensor against the established

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16

Qin, Shufang, Jun Fan, Haiming Zhang, Junwei Su, and Yi Wang. "Flume Experiments on Energy Conversion Behavior for Oscillating Buoy Devices Interacting with Different Wave Types." Journal of Marine Science and Engineering 9, no. 8 (2021): 852. http://dx.doi.org/10.3390/jmse9080852.

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Oscillating buoy device, also known as point absorber, is an important wave energy converter (WEC) for wave energy development and utilization. The previous work primarily focused on the optimization of mechanical design, buoy’s array configuration and the site selection with larger wave energy density in order to improve the wave energy generation performance. In this work, enlightened by the potential availability of Bragg reflection induced by multiple submerged breakwaters in nearshore areas, we investigate the energy conversion behavior of oscillating buoy devices under different wave typ

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17

ZHU, Q., Y. LIU, A. A. TJAVARAS, M. S. TRIANTAFYLLOU, and D. K. P. YUE. "Mechanics of nonlinear short-wave generation by a moored near-surface buoy." Journal of Fluid Mechanics 381 (February 25, 1999): 305–35. http://dx.doi.org/10.1017/s0022112098003826.

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We consider the nonlinear interaction problem of surface waves with a tethered near-surface buoy. Our objective is to investigate mechanisms for nonlinear short surface wave generation in this complete coupled wave–buoy–cable dynamical system. We develop an effective numerical simulation capability coupling an efficient and high-resolution high-order spectral method for the nonlinear wave–buoy interaction problem with a robust implicit finite-difference method for the cable–buoy dynamics. The numerical scheme accounts for nonlinear wave–wave and wave–body interactions up to an arbitrary high o

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18

Pascal, Robin W., Margaret J. Yelland, Meric A. Srokosz, et al. "A Spar Buoy for High-Frequency Wave Measurements and Detection of Wave Breaking in the Open Ocean." Journal of Atmospheric and Oceanic Technology 28, no. 4 (2011): 590–605. http://dx.doi.org/10.1175/2010jtecho764.1.

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Abstract Waves and wave breaking play a significant role in the air–sea exchanges of momentum, sea spray aerosols, and trace gases such as CO2, but few direct measurements of wave breaking have been obtained in the open ocean (far from the coast). This paper describes the development and initial deployments on two research cruises of an autonomous spar buoy that was designed to obtain such open-ocean measurements. The buoy was equipped with capacitance wave wires and accelerometers to measure surface elevation and wave breaking, downward-looking still and video digital cameras to obtain images

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19

Wei, Chih-Chiang, and Chia-Jung Hsieh. "Using Adjacent Buoy Information to Predict Wave Heights of Typhoons Offshore of Northeastern Taiwan." Water 10, no. 12 (2018): 1800. http://dx.doi.org/10.3390/w10121800.

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In the northeastern sea area of Taiwan, typhoon-induced long waves often cause rogue waves that endanger human lives. Therefore, having the ability to predict wave height during the typhoon period is critical. The Central Weather Bureau maintains the Longdong and Guishandao buoys in the northeastern sea area of Taiwan to conduct long-term monitoring and collect oceanographic data. However, records have often become lost and the buoys have suffered other malfunctions, causing a lack of complete information concerning wind-generated waves. The goal of the present study was to determine the feasi

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Avila, Deivis, Graciliano Nicolás Marichal, Ramón Quiza, and Felipe San Luis. "Prediction of Wave Energy Transformation Capability in Isolated Islands by Using the Monte Carlo Method." Journal of Marine Science and Engineering 9, no. 9 (2021): 980. http://dx.doi.org/10.3390/jmse9090980.

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In this work, a mathematical computer simulation model is used to predict the possible energy generated from different Waves Energy Converters (WECs) in the Canary Islands. The Monte Carlo Method is the computer simulation model proposed to predict the generated energy. The Waves Energy Converter systems analyzed in the study were, the Aqua Buoy, Wave Dragon and Pelamis converters. The models were implemented and validated, with the dataset of Gran Canaria deep water buoy. This buoy belongs to a network of buoys belonging to Spain’s State Ports and they cover a dataset period of 22 years. The

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Mei, Chiang C. "Hydrodynamic principles of wave power extraction." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 370, no. 1959 (2012): 208–34. http://dx.doi.org/10.1098/rsta.2011.0178.

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The hydrodynamic principles common to many wave power converters are reviewed via two representative systems. The first involves one or more floating bodies, and the second water oscillating in a fixed enclosure. It is shown that the prevailing basis is impedance matching and resonance, for which the typical analysis can be illustrated for a single buoy and for an oscillating water column. We then examine the mechanics of a more recent design involving a compact array of small buoys that are not resonated. Its theoretical potential is compared with that of a large buoy of equal volume. A simpl

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Salomon, Robert E. "Rocking buoy wave energy converter." Ocean Engineering 16, no. 3 (1989): 319–24. http://dx.doi.org/10.1016/0029-8018(89)90023-1.

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Ren, Zhi-Yuan, Hua Liu, Ben-Long Wang, and Xi Zhao. "An Investigation on Multi-Buoy Inversion Method for Tsunami Warning System in South China Sea." Journal of Earthquake and Tsunami 08, no. 03 (2014): 1440004. http://dx.doi.org/10.1142/s1793431114400041.

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The key technologies for the development of tsunami warning system include the establishment of tsunami database and inversion method for evaluating source parameters of earthquake by monitored wave data. A tsunami model based on the shallow water equations is adopted to simulate the 2011 Tohoku tsunami to validate the numerical model of generation and propagation of tsunami. The numerical results match well with measured data by DART buoys in terms of the wave height and the arrival time of the tsunami. For the potential earthquake source in the Manila Trench, the numerical model is used to c

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Brown, Adam C., and Robert K. Paasch. "The Accelerations of a Wave Measurement Buoy Impacted by Breaking Waves in the Surf Zone." Journal of Marine Science and Engineering 9, no. 2 (2021): 214. http://dx.doi.org/10.3390/jmse9020214.

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A spherical wave measurement buoy capable of detecting breaking waves has been designed and built. The buoy is 16 inches in diameter and houses a 9 degree of freedom inertial measurement unit (IMU). The orientation and acceleration of the buoy is continuously logged at frequencies up to 200 Hz providing a high fidelity description of the motion of the buoy as it is impacted by breaking waves. The buoy was deployed several times throughout the winter of 2013–2014. Both moored and free-drifting data were acquired in near-shore shoaling waves off the coast of Newport, OR. Almost 200 breaking wave

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Raghukumar, Kaustubha, Grace Chang, Frank Spada, Craig Jones, Tim Janssen, and Andrew Gans. "Performance Characteristics of “Spotter,” a Newly Developed Real-Time Wave Measurement Buoy." Journal of Atmospheric and Oceanic Technology 36, no. 6 (2019): 1127–41. http://dx.doi.org/10.1175/jtech-d-18-0151.1.

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AbstractThe Spotter is a low-cost, real-time, solar-powered wave measurement buoy that was recently developed by Spoondrift Technologies, Inc. (Spoondrift). To evaluate the data quality of the Spotter device, we performed a series of validation experiments that included comparisons between Spotter-derived motions and prescribed wave motions (monochromatic and random waves) on a custom-built, motion-controlled validation stand and simultaneous in-water measurements using a conventional wave measurement buoy, the Datawell DWR-G4 (Datawell). Spotter evaluations included time-domain validation (i.

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Ji, Zhifei, Xiaodong Yuan, Min Lin, and Jianyu Fan. "Hydrodynamic Analysis of 3-SPS Wave Energy Conversion Device." E3S Web of Conferences 271 (2021): 01013. http://dx.doi.org/10.1051/e3sconf/202127101013.

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Wave energy has the advantages of high energy density, renewability, and wide distribution, and has been highly valued by many coastal countries. The wave energy conversion device can convert wave energy into electric energy, which is of great significance for alleviating problems such as energy crisis and greenhouse effect. The traditional wave energy conversion device can only gain the energy along the heave direction, and the kinetic energy of the buoy is not fully utilized. To improve the energy utilization efficiency of the wave energy conversion device, this paper proposed a new type of

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Oskamp, Jeffrey A., and H. Tuba Özkan-Haller. "WAVE PREDICTIONS AT THE SITE OF A WAVE ENERGY CONVERSION ARRAY." Coastal Engineering Proceedings 1, no. 32 (2011): 39. http://dx.doi.org/10.9753/icce.v32.waves.39.

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The SWAN spectral wave model was applied to a domain along the coast of Oregon State, USA with the purpose of establishing a better understanding of wave conditions at a location which has been proposed for the installation of an array of Wave Energy Converters (WECs). The model uses the directional spectrum measured at a nearby NDBC (National Data Buoy Center) buoy as input and in situ measurements of waves at the proposed WEC location for model validation. It was found that wind -wave generation and bottom friction were not significant over the domain between the NDBC buoy and the WEC site (

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GARNAUD, XAVIER, and CHIANG C. MEI. "Wave-power extraction by a compact array of buoys." Journal of Fluid Mechanics 635 (September 2, 2009): 389–413. http://dx.doi.org/10.1017/s0022112009007411.

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The majority of existing single-unit devices for extracting power from sea waves relies on resonance at the peak frequency of the incident wave spectrum. Such designs usually call for structural dimensions not too small compared to a typical wavelength and yield high efficiency only within a limited frequency band. A recent innovation in Norway departs from this norm by gathering many small buoys in a compact array. Each buoy is too small to be resonated in typical sea conditions. In this article a theoretical study is performed to evaluate this new design. Within the framework of linearizatio

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McAllister, M. L., and T. S. van den Bremer. "Lagrangian Measurement of Steep Directionally Spread Ocean Waves: Second-Order Motion of a Wave-Following Measurement Buoy." Journal of Physical Oceanography 49, no. 12 (2019): 3087–108. http://dx.doi.org/10.1175/jpo-d-19-0170.1.

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AbstractThe notion that wave-following buoys provide less accurate measurements of extreme waves than their Eulerian counterparts is a perception commonly held by oceanographers and engineers (Forristall 2000, J. Phys. Oceanogr., 30, 1931–1943, https://doi.org/10.1175/1520-0485(2000)030<1931:WCDOAS>2.0.CO;2). By performing a direct comparison between the two types of measurement under laboratory conditions, we examine one of the hypotheses underlying this perception and establish whether wave measurement buoys in extreme ocean waves correctly follow steep crests and behave in a purely La

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Marks, Wilbur, and Robert G. Tuckerman. "SPLASHNIK-THE TAYLOR MODEL BASIN DISPOSABLE WAVE BUOY." Coastal Engineering Proceedings 1, no. 7 (2011): 6. http://dx.doi.org/10.9753/icce.v7.6.

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In connection with full scale ship trials, it is often necessary to have a description of the state of the sea which may be used as a scale against which to measure ship performance. Visual observations of waves have proven to be unreliable in the past and are, in any event, not sufficiently detailed to be adequately descriptive, for many problems. Hindcasting** the state of the sea depends on wind information (speed, duration, area of sea covered, and rate of growth and/or decay) obtained from six hourly weather maps. The wind data is used in conjunction with certain empirical^theoretical for

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Wu, Jinming, and Zhonghua Ni. "On the Design of an Integrated System for Wave Energy Conversion Purpose with the Reaction Mass on Board." Sustainability 12, no. 7 (2020): 2865. http://dx.doi.org/10.3390/su12072865.

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In this paper, we investigate the design of an integrated system consisting of two non-rigidly connected bodies: A floating buoy and an emerged offshore structure. When waves excite the buoy to oscillate, the relative motion between the two bodies are converted to useful energy through a spring damper system, resulting in wave energy being absorbed. The parameter to design includes the mass and underwater shape of the buoy. The spring stiffness of the power take-off (PTO) system is constrained to be non-negative with the concerns of complexity in implementation and system stability. Results su

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Hu, Yuan, Shaohui Yang, Hongzhou He, and Hu Chen. "Influence of Central Platform on Hydrodynamic Performance of Semi-Submerged Multi-Buoy Wave Energy Converter." Journal of Marine Science and Engineering 8, no. 1 (2019): 12. http://dx.doi.org/10.3390/jmse8010012.

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The influence of the central platform on hydrodynamic performance of a wave energy converter (WEC) has remained elusive. To approach this dearth of relevant theoretical research, this paper presents a semi-submerged multi-buoy WEC and the results of the numerical analysis at different dimension parameters of the central platform of the WEC. The WEC consists of three oscillating buoys hinged with a central platform through multiple actuating arms. Numerical analysis revealed that there exists a relationship between the hydrodynamic performance of device and the geometry of the central platform.

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Lyu, Qin, De Tang Li, Zheng Shou Chen, Da Te Li, Wen Tao Tang, and Wei Nan Cao. "Experimental Analysis of the Interaction Effect between Wave Power Platform Buoys of "Haiyuan 1" in Real Sea Conditions." Applied Mechanics and Materials 713-715 (January 2015): 997–1002. http://dx.doi.org/10.4028/www.scientific.net/amm.713-715.997.

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In order to study the interaction effect between three buoys of wave power platform of "Haiyuan 1", we’ve made a research to that wave power platform in real sea conditions. We tested respectively the motion curve of different buoys, calculated the average delivered power, and analyze the interaction effect of buoys. We hope that the experimental result can provide technical support for the arrangement of wave power platform buoy.

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Smit, Pieter Bart, Tim Janssen, Wheeler Gans, and Cameron Dunning. "REAL-TIME ASSIMILATION USING A DENSE ARRAY OF DIRECTIONAL WAVE OBSERVATIONS." Coastal Engineering Proceedings, no. 36 (December 30, 2018): 6. http://dx.doi.org/10.9753/icce.v36.waves.6.

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Wave conditions along our coastlines are monitored using networks of wave buoys. Augmented with regional wave now- and hind-casts from operational wave models, these data networks provide detailed regional information of wave conditions providing vital updates of wave conditions for maritime, engineering, recreational and scientific purposes. Currently, the observational networks are mostly used to initiate models and assess model performance, but are usually not directly integrated into the modeling system. Recent work by Crosby et al. (2017) explores the integration of buoy data into models

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Crosby, Sean C., Bruce D. Cornuelle, William C. O’Reilly, and Robert T. Guza. "Assimilating Global Wave Model Predictions and Deep-Water Wave Observations in Nearshore Swell Predictions." Journal of Atmospheric and Oceanic Technology 34, no. 8 (2017): 1823–36. http://dx.doi.org/10.1175/jtech-d-17-0003.1.

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AbstractNearshore wave predictions with high resolution in space and time are needed for boating safety, to assess flood risk, and to support nearshore processes research. This study presents methods for improving regional nearshore predictions of swell-band wave energy (0.04–0.09 Hz) by assimilating local buoy observations into a linear wave propagation model with a priori guidance from global WAVEWATCH III (WW3) model predictions. Linear wave propagation, including depth-induced refraction and shoaling, and travel time lags, is modeled with self-adjoint backward ray tracing techniques. The B

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Bokhove, Onno, Anna Kalogirou, David Henry, and Gareth P. Thomas. "A novel wave-energy device with enhanced wave amplification and induction actuator." International Marine Energy Journal 3, no. 1 (2020): 37–44. http://dx.doi.org/10.36688/imej.3.37-44.

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A novel wave-energy device is presented. Both a preliminary proof-of-principle of a working, scaled laboratory version of the energy device is shown as well as the derivation and analysis of a comprehensive mathematical and numerical model of the new device. The wave-energy device includes a convergence in which the waves are amplified, a constrained wave buoy with a (curved) mast and direct energy conversion of the buoy motion into electrical power via an electro-magnetic generator. The device is designed for use in breakwaters and it is possible to be taken out of action during severe weathe

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Herbers, T. H. C., P. F. Jessen, T. T. Janssen, D. B. Colbert, and J. H. MacMahan. "Observing Ocean Surface Waves with GPS-Tracked Buoys." Journal of Atmospheric and Oceanic Technology 29, no. 7 (2012): 944–59. http://dx.doi.org/10.1175/jtech-d-11-00128.1.

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Abstract Surface-following buoys are widely used to collect routine ocean wave measurements. While accelerometer and tilt sensors have been used for decades to measure the wave-induced buoy displacements, alternative global positioning system (GPS) sensor packages have been introduced recently that are generally smaller, less expensive, and do not require calibration. In this study, the capabilities of several GPS sensors are evaluated with field observations in wind-sea and swell conditions off the California coast. The GPS buoys used in this study include Datawell Directional Waverider and M

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Crosby, Sean C., William C. O’Reilly, and Robert T. Guza. "Modeling Long-Period Swell in Southern California: Practical Boundary Conditions from Buoy Observations and Global Wave Model Predictions." Journal of Atmospheric and Oceanic Technology 33, no. 8 (2016): 1673–90. http://dx.doi.org/10.1175/jtech-d-16-0038.1.

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AbstractAccurate, unbiased, high-resolution (in space and time) nearshore wave predictions are needed to drive models of beach erosion; coastal flooding; and alongshore transport of sediment, biota, and pollutants. On sheltered shorelines, wave predictions are sensitive to the directions of onshore propagating waves, and nearshore model prediction error is often dominated by directional uncertainty offshore. Here, regional wave model skill in highly sheltered Southern California is compared for different offshore boundary conditions created from offshore buoy observations and global wave model

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Venkatesan, Ramasamy, Narayanaswamy Vedachalam, Karakunnel Jossia Joseph, and Gopalakrishnan Vengatesan. "Data Returns and Reliability Metrics From the Indian Deep Ocean Wave Measurement Buoys." Marine Technology Society Journal 53, no. 6 (2019): 6–20. http://dx.doi.org/10.4031/mtsj.53.6.1.

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AbstractReliable performance is the key requirement for deep ocean wave measurement buoys as failures lead to loss of data and expensive reinstallations. From more than 0.37 million demanding offshore wave measurement buoy-hours, the data returns from the buoys operating in the Bay of Bengal and the Arabian Sea were 88% and 95%, respectively. The mean time between failures of the buoys was 1.8 years in the Bay of Bengal and 3.8 years in the Arabian Sea, and the mean time to restore was 90 and 68 days, respectively. The offshore failure events, the technical developments for improving the perfo

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Reale, Ferdinando, Fabio Dentale, Pierluigi Furcolo, Angela Di Leo, and Eugenio Pugliese Carratelli. "An Experimental Assessment of Extreme Wave Evaluation by Integrating Model and Wave Buoy Data." Water 12, no. 4 (2020): 1201. http://dx.doi.org/10.3390/w12041201.

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Calculating the significant wave height (SWH) in a given location as a function of the return time is an essential tool of coastal and ocean engineering; such a calculation can be carried out by making use of the now widely available weather and wave model chains, which often lead to underestimating the results, or by means of in situ experimental data (mostly, wave buoys), which are only available in a limited number of sites. A procedure is hereby tested whereby the curves of extreme SWH as a function of the return time deriving from model data are integrated with the similar curves computed

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Jensen, Robert Edward, Val Swail, and Richard Harry Bouchard. "Quantifying wave measurement differences in historical and present wave buoy systems." Ocean Dynamics 71, no. 6-7 (2021): 731–55. http://dx.doi.org/10.1007/s10236-021-01461-0.

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AbstractAn intra-measurement evaluation was undertaken, deploying a NOMAD buoy equipped with three National Data Buoy Center and two Environment and Climate Change Canada-AXYS sensor/payload packages off Monterey, California; a Datawell Directional Waverider buoy was deployed within 19 km of the NOMAD site. The six independent wave measurement systems reported hourly estimates of the frequency spectra, and when applicable, the four Fourier directional components. The integral wave parameters showed general agreement among the five sensors compared to the neighboring Datawell Directional Waveri

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Chen, Hu, Zhifei Ji, Yusheng Hu, and Min Lin. "Influence of Buoy Size on Accelerated Wave Power Generation Device." E3S Web of Conferences 271 (2021): 01023. http://dx.doi.org/10.1051/e3sconf/202127101023.

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This paper proposed a pulley-buoy accelerated wave energy linear power generation system, and the feasibility and effectiveness of this system were verified through experimental research. Compared with the traditional wave energy power generation system with three-stage energy conversion links, the pulley-buoy accelerated wave energy linear power generation system omits the intermediate energy transfer and conversion link, and realizes the direct gain of electric energy from the buoy movement caused by wave, and by introducing the pulley combination, the movement speed of the buoy is enlarged,

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Wang, Taiping, Zhaoqing Yang, Wei-Cheng Wu, and Molly Grear. "A Sensitivity Analysis of the Wind Forcing Effect on the Accuracy of Large-Wave Hindcasting." Journal of Marine Science and Engineering 6, no. 4 (2018): 139. http://dx.doi.org/10.3390/jmse6040139.

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Deployment of wave energy converters (WECs) relies on consistent and accurate wave resource characterization, which is typically achieved through numerical modeling using deterministic wave models. The accurate predictions of large-wave events are critical to the success of wave resource characterization because of the risk on WEC installation, maintenance, and damage caused by extreme sea states. Because wind forcing is the primary driver of wave models, the quality of wind data plays an important role in the accuracy of wave predictions. This study evaluates the sensitivity of large-wave pre

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Mao, Lai Feng, Jun Zhang, Quan You Qu, and Hong Zhou He. "Investigation and Analysis on the Performance of the Oscillating Buoy Wave Power Device under the South China Sea." Applied Mechanics and Materials 321-324 (June 2013): 1365–72. http://dx.doi.org/10.4028/www.scientific.net/amm.321-324.1365.

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The oscillating buoy wave power device is more effective than other devices in energy conversion efficiency, and now it has been widely applied in development of marine wave energy. The oscillating buoy, which is an important component for the oscillating buoy wave power device, is closely related to energy conversion efficiency. In this paper, considering applying conditions in South China Sea, the dynamic characteristic for oscillating buoy is simulated using AQWA software. By analyzing and comparing dynamic characteristics of several different structure bodies, an optimal structure buoy is

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Zhu, Linsen, Yangang Wang, Ze Yang, and Yanming Qu. "Buoy-Rope-Drum Wave Power System." Advances in Mechanical Engineering 5 (January 2013): 609464. http://dx.doi.org/10.1155/2013/609464.

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Shonting, D., F. Middleton, J. Knox, and P. Hebda. "A submarine-launched wave measuring buoy." Ocean Engineering 23, no. 6 (1996): 465–81. http://dx.doi.org/10.1016/0029-8018(95)00055-0.

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Hoitink, A. J. F., H. C. Peters, and M. Schroevers. "Field Verification of ADCP Surface Gravity Wave Elevation Spectra." Journal of Atmospheric and Oceanic Technology 24, no. 5 (2007): 912–22. http://dx.doi.org/10.1175/jtech2000.1.

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Abstract Acoustic Doppler current profilers (ADCPs) can measure orbital velocities induced by surface gravity waves, yet the ADCP estimates of these velocities are subject to a relatively high noise level. The present paper introduces a linear filtration technique to significantly reduce the influence of noise and turbulence from energy spectra of combined orbital velocity measurements. Data were collected in 13-m-deep water with a 1.2-MHz ADCP sampling in mode 12, where a collocated wave buoy was used for verification. The surface elevation spectra derived from the filtrated and nonfiltrated

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Zhao, Xuanlie, Dezhi Ning, Chongwei Zhang, Yingyi Liu, and Haigui Kang. "Analytical Study on an Oscillating Buoy Wave Energy Converter Integrated into a Fixed Box-Type Breakwater." Mathematical Problems in Engineering 2017 (2017): 1–9. http://dx.doi.org/10.1155/2017/3960401.

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An oscillating buoy wave energy converter (WEC) integrated to an existing box-type breakwater is introduced in this study. The buoy is installed on the existing breakwater and designed to be much smaller than the breakwater in scale, aiming to reduce the construction cost of the WEC. The oscillating buoy works as a heave-type WEC in front of the breakwater towards the incident waves. A power take-off (PTO) system is installed on the topside of the breakwater to harvest the kinetic energy (in heave mode) of the floating buoy. The hydrodynamic performance of this system is studied analytically b

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Garnaud, Xavier, and Chiang C. Mei. "Bragg scattering and wave-power extraction by an array of small buoys." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 466, no. 2113 (2009): 79–106. http://dx.doi.org/10.1098/rspa.2009.0458.

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Future designs of systems for power extraction from ocean waves will likely involve a periodic array of absorbing units. We report an asymptotic theory of scattering and radiation by a linear array of heaving buoys in a channel and attached to power-takeoff devices. The spacing between buoys is assumed to be comparable to the incident wavelength and sea depth but much greater than the buoy size. The effects of extraction rate on the buoy motion, transmission and reflection coefficients for a range of frequencies in and outside the band gap are studied. It is found that strong reflection for fr

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Londhe, S. N., and Vijay Panchang. "One-Day Wave Forecasts Based on Artificial Neural Networks." Journal of Atmospheric and Oceanic Technology 23, no. 11 (2006): 1593–603. http://dx.doi.org/10.1175/jtech1932.1.

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Abstract Sophisticated wave models like the Wave Model (WAM) and Simulating Waves Nearshore (SWAN)/WAVEWATCH are used nowadays along with atmospheric models to produce forecasts of ocean wave conditions. These models are generally run operationally on large ocean-scale domains. In many coastal areas, on the other hand, operational forecasting is not performed for a variety of reasons, yet the need for wave forecasts remains. To address such cases, the production of forecasts through the use of artificial neural networks and buoy measurements is explored. A modeling strategy that predicts wave

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