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 70 for “"submersible"”.
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A towed submersible
One way to continuously scan the sea would be to tow a submarine vehicle that would cycle vertically in the water between set depths. Its period of vertical oscillation would be short compared with the changes in parameters to be measured, in this case long internal waves. It would carry …
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A towed submersible
One way to continuously scan the sea would be to tow a submarine vehicle that would cycle vertically in the water between set depths. Its period of vertical oscillation would be short compared with the changes in parameters to be measured, in this case long internal waves. It would carry …
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Deep submersible logistic support design concept
… of the logistic and operational problems of deep submersibles using a support craft-submersible combination. Shown is an improved vehicle launch and recovery method and a means to transfer personnel, supplies, and services during sea conditions presently detrimental to such operations. The …
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DYNAMICS OF A SUBMERSIBLE MUSSEL RAFT
The dynamics of a submersible mussel raft were analyzed using wave tank testing, numerical modeling, and full-scale field tests. When submerged, the raft’s pontoons are flooded, and it is held vertically by lines attached to surface floats and horizontally by a spread mooring. This submerged …
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Magnetic levitation for down-hole submersible pumps
… flow and pressure levels equal to conventional submersible pumps, if the current to the motor is increased by a factor of approximately 2.5. Such a current increase is possible without exceeding the thermal limits of the motor. Results show that designing and building magnetic levitation motors …
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Design and construction of submersible hand controllers
Thesis: B.S., Massachusetts Institute of Technology, Department of Mechanical Engineering, 1981
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Variable ballast system design for an unmanned submersible
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1983.
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Design and analysis of a Non-Pressurized Manned Submersible
Non-Pressurized Manned Submersibles (NPMS) have proven their utility in warfare for centuries, demonstrating an unmatched combination of simplicity and versatility in both declared conflicts and undeclared, covert operations. Today, the SEAL Delivery Vehicle (SDV) Mk8 Mod1 remains the United States …
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Optimized design and structural analysis of a non-pressurized manned submersible
… and optimization of a non-pressurized manned submersible (NPMS), a type of fully "flooded" submersible based on a SEAL Delivery Vehicle (SDV) Design Concept. Using the design parameters determined by the mathematical model, a solid model was generated and an ANSYS goal-driven optimizer was …
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Characterization of the Acquisition Parameters of a Submersible Gamma-Ray Computed Tomography System
… of this work is to study a component of a submersible gamma-ray computed tomography (CT) system used in the non-destructive testing of irradiated nuclear fuels. The first section of this study proposes two acceleration approaches for rapidly modeling a transmission-type gamma-ray tomography …
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Development of a modular and submersible soft robotic arm system and corresponding learned kinematics models
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2023-12-01
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Modeling a Semi-Submersible Floating Offshore Wind Turbine With Tuned Inerter Dampers Within the Platform
With growing awareness of climate change and an increased interest in renewable energy, resources like offshore wind are projected to grow in the near future. One key issue within offshore wind is how to stabilize the floating system when it experiences large wind and wave forces that impact its …
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Vibration Reduction and Energy Harvesting using Motion-Rectified Tuned Mass-Damper-Inerters in Semi-Submersible Offshore Wind Platforms
… particularly floating structures such as semi-submersibles. Vibrations in the pitch and heave directions associated with greater yaw-bearing and tower-base bending moments, respectively, reduce the lifespan of these structures. This paper compares traditional tuned-mass dampers (TMDs) and …
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Risk-based treatment of uncertainty in trade space exploration : application via Monte Carlo simulation on a manned, mini-submersible model
… for the conceptual design of a manned, mini-submersible is used to demonstrate an approach for quantifying and visualizing uncertainty to inform decision-making. This case study suggests that visualizing risk at the system level in a typical performance versus cost context is valuable.
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Structural performance of a hybrid sandwich submersible pressure hull : stress and stability analysis of a stiffened cylindrical shell including through-thickness shear
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1995.
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Design and evaluation of a modified in situ mesocosm to study denitrification in the Karlsruhe aquifer
… The modified design also includes an optional submersible pump mounted on top of the ISM chamber, making it capable of applications at depths greater than those attainable using a peristaltic pump from the ground surface. Two ISMs, one the original design (0-ISM) and the other the modified …
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Creation and deployment of the NEREUS autonomous underwater chemical analyzer and Kemonaut, an odyssey class submarine
NEREUS is a compact self-contained low-power submersible membrane-inlet mass spectrometer, designed to measure dissolved volatile gasses in the water column. It is capable of intelligent data collection, analysis and state-based mission control while operating as a stand-alone instrument or onboard …
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