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  • 1
    Buch
    Buch
    New York, NY [u.a.] : Wiley
    Schlagwort(e): Boje
    Beschreibung / Inhaltsverzeichnis: Aus dem Inhalt: Part I) Mechanics of floating bodies 1) Statics of free floating bodies 2) Dynamics of free floating bodies 3) Hydrodynamic forces on constrained floating bodies Part II) Mechanics of mooring lines 4) Statics of mooring lines 5) Dynamics of mooring lines.
    Materialart: Buch
    Seiten: XVIII, 314 S , Ill., graph. Darst
    ISBN: 0471071560
    Serie: Ocean engineering
    DDC: 627/.924
    Sprache: Englisch
    Anmerkung: Literaturangaben
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 2
    Publikationsdatum: 2022-05-25
    Beschreibung: Under the sponsorship of the Naval Surface Warfare Center (NSWC), Dalgren Division, White Oak, Marland, the Ocean Systems & Mooring Laboratory of the Woods Hole Oceanographic Institution devised (1991) and conducted (1992) an experiment to measure the dynamic response of a full scale model of the CAPTOR mine, submerged and moored in strong tidal currents near Woods Hole, MA. Specifically, the purpose of this sophisticated engineering experiment was to obtain long term, high frequency measurements of the spatial position of the CAPTOR body, of the tension at both ends of the mooring line, and of the mooring line strumming, as a function of the currents prevailing at the site. This report first describes the main components and the method of deployment of the complex CAPTOR Dynamics Experiment (CAPTORDYN) set up. It then presents the mechanical and electrical designs of the entire system. Finally a review of the results obtained concludes the report.
    Beschreibung: Funding was provided by the Naval Surface Warfare Center under Contract No. N60921-91-C-0216.
    Schlagwort(e): Moored mine dynamics ; Buoy dynamics ; Mooring dynamics
    Repository-Name: Woods Hole Open Access Server
    Materialart: Technical Report
    Format: 2840213 bytes
    Format: application/pdf
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 3
    Publikationsdatum: 2022-05-25
    Beschreibung: This report documents the work performed by the Woods Hole Oceanographic Institution (WHOI) and the Battelle Memorial Institute from August 1988 to December 1992 in the NSF sponsored development of an Integrated Seawater Sampler and Data Acquisition Prototype. After a 6-month initial design study, a prototype underwater profiing unit was designed and constructed, containing the water acquisition subsystem, CTD and altimeter, control circuitry and batteries. A standard WHOI CTD was adapted for use in the underwater unit and was interfaced to the underwater controller which had a telemetry module connecting ít with a deck control unit. This enabled CTD data to be logged in normal fashion on shipboard while additional commands and diagnostics were sent over the telemetry link to command the underwater unit's water sampling process and receive diagnostic information on system performance. The water sampling subsystem consisted of 36 trays, each containing a plastic sample bag, the pump and control circuitry. The sample bags, initially sealed in a chemically clean environment, were opened by pumping the water out of the tray, thus forcing water into the bag by ambient pressure. The command system could select any bag, and control the water sampling procss from the surface with diagnostic information on system altitude, depth, orientation and cable tension displayed in real time for operator information. At sea tests confirmed the operation of the electrical and control system. Problems were encountered with the bags and seals which were partially solved by further post cruise efforts. However, the bag closing mechanism requires further development, and numerous small system improvements identified during the cruises need to be implemented to produce an operational water sampler. Finally, initial design tor a water sampler handling and storage unit and water extraction system were developed but not implemented. The detailed discussion of the prototype water sampler design, testing and evaluation, and new bag testing result are presented.
    Beschreibung: Funding was provided by the National Science Foundation through Grant No. OCE8821977.
    Schlagwort(e): Seawater sampler ; Shipboard profiing system ; Chemical free sample bags
    Repository-Name: Woods Hole Open Access Server
    Materialart: Technical Report
    Format: 11215258 bytes
    Format: application/pdf
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 4
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    Unbekannt
    Woods Hole Oceanographic Institution
    Publikationsdatum: 2022-05-25
    Beschreibung: An Engineering Surface Oceanographic Mooring (ESOM) program was initiated in 1989 by the Woods Hole Oceanographic Institution for the purpose of evaluating the long term, in situ performance of new moored array materials and sensors. For logistic and practical reasons, a site 12 miles southwest of Bermuda, with a water depth of 3000m was selected to deploy the mooring. Following well established design practice the upper part of the mooring down to a depth of 1900m was made of plastic jacketed, steel armored wire ropes and cables. Groups of test samples were attached at different depths to the main mooring line. The lower part of the mooring was made of compliant, plaited nylon rope. The mooring was deployed in March 1989. It was recovered and reset, with a vertical acoustic telemetry prototype system, in April 1990. The at-sea phase of the program ended in November 1990 when the termination of a test cable failed and the mooring broke loose. The entire mooring was recovered and all of its samples and components were carefully inspected and tested. In addition to the novel acoustic link, mooring components tested included new wire ropes, new electromechanical cables and their terminations, low drag fairings, fishbite resistant jackets, and a new type of surface buoy.
    Beschreibung: Funding was provided by the Office of Naval Research under Contract No. N00014-90-J-1719.
    Schlagwort(e): Mooring components ; Fishbite ; Acoustic telemetry
    Repository-Name: Woods Hole Open Access Server
    Materialart: Technical Report
    Format: 3728872 bytes
    Format: application/pdf
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  • 5
    Publikationsdatum: 2022-05-25
    Beschreibung: This report is the last of a series of three reports on a comprehensive study of CTD instrument lowering mechanics. The first report, WHOI 79-81, "A Study of CTD Cables and Lowering Systems", examines the causes and modes of lowering cable failures, both mechanical and electrical, and makes recommendations to improve existing instrument packages and lowering procedures. The second report, WHOI 81-76, "Hydrodynamics of CTD Instrument Packages", is a theoretical study of instrument package stability when cable lowered or free falling. The model is used to predict the hydrodynamic response of CTD packages in their present or improved configuration. This report, WHOI 83-21, is more factual. It describes the tests performed on scale models and actual CTD packages to actually observe and/or measure their hydrodynamic behavior. Analytical results and experimental data obtained in this study are used to draw recommendations for CTD package improvement and future lowering procedures.
    Beschreibung: Prepared for the Office of Naval Research under Contract N00014-72-C-0019.
    Schlagwort(e): Oceanographic instruments ; Hydrodynamics
    Repository-Name: Woods Hole Open Access Server
    Materialart: Technical Report
    Format: application/pdf
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 6
    Publikationsdatum: 2022-05-25
    Beschreibung: The Low Frequency Acoustic Seismic Experiment (LFASE) was conducted to measure sound propagation and ambient noise above, at and below the sea floor. To this end an array consisting of four geophone nodes was introduced into a DSDP borehole. These seismic sensors were clamped inside the borehole at various depths below the ocean floor. The geophone array was connected by an electromechanical cable to a bottom reentry structure (BCU frame) housing the Data Recording Unit (DRU), the Data Telemetry Unit (DTU), the Bottom Control Unit (BCU) and the power supply.
    Beschreibung: Report prepared under Office of Naval Research Contracts #N00014-89-C-0018, N00014-89-J-1012 and Office of Naval Technology Contract #00014-90-C-0098, WHOI Project #13/1012
    Schlagwort(e): Seismic arrays ; Seismology ; Melville (Ship) Cruise HYDR01MV ; Melville (Ship) Cruise HYDR05MV ; Melville (Ship) Cruise HYDR09MV ; Melville (Ship) Cruise HYDR10MV
    Repository-Name: Woods Hole Open Access Server
    Materialart: Working Paper
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 7
    Publikationsdatum: 2022-05-25
    Beschreibung: The following report describes the scientific motivations for the use of a Sea Floor Winch System for Wireline Re-entry of Deep Sea Boreholes and presents a conceptual design for the winch system.
    Beschreibung: This report has been prepared for the Scripps Institution of Oceanography under U.C.S.D. Order # G29733-0901.
    Schlagwort(e): Oceanographic instruments ; Winches
    Repository-Name: Woods Hole Open Access Server
    Materialart: Working Paper
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 8
    Publikationsdatum: 2022-05-25
    Beschreibung: The Seafloor Borehole Array Seismic System (SEABASS) has been developed to measure the pressure and three dimensional particle velocity of the VLF sound field (2-50HZ) below the seafloor in the deep ocean (water depths of up to 6km). The system consists off our three-component borehole seismometers (with an optional hydrophone), a borehole digitizing unit, and a seafloor control and recording package. The system can be deployed using a wire line re-entry capability from a conventional research vessel in Deep Sea Drilling Project (DSDP) and Ocean Drilling Project (ODP) boreholes. Data from below the seafloor are acquired either on-board the research vessel via coaxial tether or remotely on the seafloor in a self-contained package. If necessary the data module from the seafloor package can be released independently and recovered on the surface. This paper describes the engineering specifications of SEABASS, the tests that were carried out, and preliminary results from an actual deep sea deployment. Ambient noise levels beneath the seafloor acquired on the Low Frequency Acoustic-Seismic Experiment (LFASE) are within 20dB of levels from previous seafloor borehole seismic experiments and from land borehole measurements. The ambient noise observed on LFASE decreases by up to 12dB in the upper 100m of the seafloor in a sedimentary environment.
    Beschreibung: This work was carried out under JHU Contract # 602809-0 and under ONR contracts #N00014-89-C-0018, #N00014-89-J-1012, and #N00014-90-C-0098.
    Schlagwort(e): Very Low Frequency (VLF) sound fields (2-50 Hz) ; Seafloor Borehole Array Seismic System (SEABASS) ; Deep Sea Drilling Project (DSDP). ; Low Frequency Acoustic-Seismic Experiment (LFASE)
    Repository-Name: Woods Hole Open Access Server
    Materialart: Working Paper
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 9
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    Woods Hole Oceanographic Institution
    Publikationsdatum: 2022-05-26
    Beschreibung: As part of a development effort in the field of moored arrays sponsored by the Office of Naval Technology, the Ocean Structures and Moorings Laboratory (OSM&L), Applied Ocean Physics and Engineering Department (AOP&E), Woods Hole Oceanographic Institution (WHOI) conducted a study in 1991 to assess the feasibility and the merits of several self-deployable mooring designs. This study included a brief review of the state of the art, the performance of lab tests to evaluate different mooring line payout concepts, and the preliminary design of a typical candidate mooring. The results of this study are presented in this report. The report first reviews three types of single point moored arrays which are amenable to self-deployment: subsurface, subsurface with surface expression, and surface with bottom inverted catenary. It then describes the features common to all self-deploying moorings: techniques for line and instrument storage, means for controlled payout, bottom finders and lock up mechanisms, and it also outlines desirable specifications for sensor sizes, cables and connectors. Next the report reviews typical deployment scenarios from the bottom up or from the surface down as they apply to the three types of moorings retained. In its final section, the report presents the conceptual design of a 6000 meters depth capability, bottom up deployment, candidate mooring. This configuration should be of strong interest when contemplating the deployment of a large number of identical subsurface moorings, interconnected by a bottom cable, and in "close" proximity to one another. The case study outlines the design objectives and the current profiles, specifies the main components, evaluates their performance with the help of a standard computer program, and presents packaging and payout control details. Finally, a plan is proposed for the controlled, in-situ evaluation of a prototype.
    Beschreibung: Funding was provided by the Office of Naval Technology under Contract No. N00014-90-C-0098.
    Schlagwort(e): Moored arrays ; Self-deployable moorings ; Expendable moorings
    Repository-Name: Woods Hole Open Access Server
    Materialart: Technical Report
    Format: 1679772 bytes
    Format: application/pdf
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 10
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    Unbekannt
    Woods Hole Oceanographic Institution
    Publikationsdatum: 2022-05-26
    Beschreibung: The following report describes a computer solution to help predict the heave and roll response of free floating bodies of cylindrical shape when excited by random seas with known spectra. The basic concepts of harmonic analysis and statistics used in the method are first briefly reviewed. The report then presents a detailed derivation of the linear heave and roll response amplitude operators, that is the expressions of the vertical and angular displacements produced by a simple harmonic wave of one foot amplitude. The second part of the report reviews the computation procedure and the program's logic. It gives a detailed set of instructions for the program users, reviews the program's capabilities and limitations, and presents three case studies. The heave and roll response programs are written for use with XEROX SIGMA 7 computers. Program listings are given in the appendix.
    Beschreibung: Prepared for the Office of Naval Research under Contract N00014-75-C-l064; NR 294-004 and from the NOAA Data Buoy Office.
    Schlagwort(e): Oceanographic buoys ; Harmonic analysis ; Spar buoys ; Buoy dynamics
    Repository-Name: Woods Hole Open Access Server
    Materialart: Technical Report
    Format: application/pdf
    Standort Signatur Einschränkungen Verfügbarkeit
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