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 75 for “"Towing"”.
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Non-linear extreme tension statistics of towing hawsers
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1988.
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Systems architecting approach to towing and salvage ship recapitalization
Four salvage ships and four ocean-going towing ships are maintained and operated by the Military Sealift Command (MSC) for the U.S. Navy. In 2019, the first T-ATF ships will reach the end of their 40-year life expectancy. The program manager for these vessels has a set of top-level performance …
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Calculation of extreme towline tension during open ocean towing
Thesis (Nav. E.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1997, and Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1997.
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Dynamics of an Autonomous Underwater Vehicle (AUV) towing another AUV
… the dynamics of an autonomous underwater vehicle towing another autonomous underwater vehicle of equivalent size using a marine cable in the vertical and horizontal plane. There is a coupling effect between the two vehicles because the towed vehicle is of equivalent size. This means that the towed …
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Experimental Determination of an AUV's Drag Resistance in a Towing Tank
… of using a calm-water resistance test in a towing tank to determine the resistance of an AUV. A scale model of a survey class AUV was created using a 3d printer and mounted in a towing tank. The model was towed, and the resistance force recorded for a range from 0.3 to 0.9 m/s. An estimation …
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The dynamic behavior of nylon and polyester rope under simulated towing conditions
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1988, and (M.S.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1988.
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Creating a flexible, Web-enabled learning and research facility at the M.I.T. Towing Tank
The M.I.T. Towing Tank has served as an invaluable research and educational platform for over 50 years. The hands-on learning experiences of towing tank tests have helped countless students to grasp the concepts and theories that are taught in the classroom environment. A recent upgrade of the …
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Evaluation of the performance of sailing vessels based on towing tank and sailforce data
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1992.
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Development of a Tow Capacity Test Device for Small Unmanned Vehicles
… from a battlefield, transporting supplies, and towing other small vehicles and payloads. To date, the unmanned test community has not standardized on an apparatus or test operating procedure (TOP) specifically for evaluating the towing capacity of small unmanned ground vehicles. Draw-bar testing …
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Design and Simulation of a Towed Underwater Vehicle
… fixed somewhere along the length of the towing cable. This type of setup is known as a two-part towing arrangement. This thesis examines the dynamics, stability and control of the two-part tow. A Simulink simulation that models the towfish dynamics was implemented. Through this Simulink …
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Depth discrimination of an acoustic source based on modal energy distribution - performance analysis/
… acoustic sources was investigated in realistic towing scenarios. The method uses modal energy distribution as a categorical indicator for the source depth. In this study we analyzed the method performance in two major towing patterns: the "yo-yo" pattern and the "one-time" depth sampling …
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Towfish Design, Simulation and Control
… components of fluid velocity in a column. By towing such a device in a sensor platform, called a towfish, one may measure turbulent mixing in a vertical swath of the ocean. If the towfish attitude is not precisely regulated, however, the turbulence measurements can be irreversibly corrupted. A …
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The Impact of Rolling Dynamic Compaction
… homogeneous soil conditions. It was found that towing speed quantifiably influenced the energy imparted into the ground, with towing speeds of 10-12 km/h found to be optimal. Targeted full-scale field trials were undertaken to quantify the depth of improvement that can be achieved using RDC. …
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Design and vibration testing of a flexible seal whisker model
… quality data to be gathered at a larger range of towing speeds. Using this data we observed correlations between towing speed, vibration frequency, g forces, and displacement in the whisker's vertical axis of motion. Further work could be done to examine whisker motion in multiple axes, as well as …
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Bayesian optimization and Cartesian-grid simulations for artificial reef design
… combination with Cartesian-grid simulations and towing tank experiments. To ensure the structure’s strength, ease of implementation, and biocompatibility, the reef structures were designed to be porous. Finally, the complete artificial reef was constructed and tested in a towing tank with waves …
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An airport on display
… system from arriving, to maintaining, to towing, to parking, and to departing. As well, it is a fully-functional airport, consisting of a sequence of functional spaces, including: runway, taxi area, maintenance hangar, towing corridor, parking spots, and auxiliary spaces. In the context of …
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Slamming of High Speed Craft: A Parametric Study of Severe Cases
… events investigated were chosen based on towing tank experiments previously conducted at the U.S. Naval Academy. Hydrodynamic forces were measured globally and also at particular locations near the bow. The vertical motions were programmed into a pair of linear actuators that were rigidly …
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An experimental investigation of fluid dynamic interference forces
… have been conducted in the VPI & SU towing basin to assess the feasibility of testing fully submerged configurations, simulating aerodynamic phenomena, and in particular, measuring aerodynamic interference force between blunt bodies. Special instrumented struts were constructed and …
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A: A method of producing a towing tank model of an irregular sea containing a continuous distribution of frequencies. B: Experimental determination of wave form and ship responses maxima in comparison with statistically estimated data.
Massachusetts Institute of Technology. Dept. of Naval Architecture and Marine Engineering. Thesis. 1966. M.S.
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A towed submersible
… paper drum or else transmitting the data to the towing vessel. It could be designed so that it was relatively independent of ship speed and self-contained so that it could operate unattended for long periods of the normal oceanographic surveys require regular stops for geological core samples to …
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