Naval Postgraduate School
Theses and Dissertations
Now showing items 11-20 of 157
Attitude control of an underwater vehicle subjected to waves.
(Monterey, California. Naval Postgraduate School, 1994)
This paper presents a method for estimating the spectra of water wave disturbances on
five of the six axes of a stationary, slender body underwater vehicle in an inertia dominated wave
force regime, both in head seas and ...
Free-surface/vorticity interaction
(Monterey, California. Naval Postgraduate School, 1993-09)
The unsteady flow phenomena resulting from the interaction of wakes and vortices with the free surface are of particular importance in naval hydrodynamics. Ship and submarine wakes produce a three-dimensional complex ...
Mine avoidance and localization for underwater vehicles using continuous curvature path generation and non-linear tracking control
(Monterey, California. Naval Postgraduate School, 1993-09)
Many underwater vehicles have been designed to follow a straight path using linear approximations about that path. Tracking a dynamic path of arbitrary but continuous curvature may often be desired. This will require a ...
Correlation of flux composition and inclusion characteristics with submerged arc weld metal properties in HY-100 steel
(Monterey, California. Naval Postgraduate School, 1993-09)
Submerged arc weldments of HY-100 steel prepared under standard conditions with five commercially available fluxes were analyzed to discern a basis for the variation in mechanical properties associated with different flux ...
Theoretical study of laminar film condensation on horizontal elliptical tubes under conditions of free and forced convection
(Monterey, California: Naval Postgraduate School, 1993-03)
Analytical studies have been made of laminar film condensation on a horizontal elliptical cylinder in a pure saturated vapor under conditions of free and forced convection. Estimation of interfacial shear stress was made ...
Optimization techniques for contact stress analysis.
(Monterey, California. Naval Postgraduate School, 1992-12)
The analysis of stresses induced by contact between two bodies is inherently difficult
because the size of the contact zone is unknown and constantly changing throughout
loading. To overcome these difficulties, two ...
Coupled roll and directional stability characteristics of surface ships.
(Monterey, California. Naval Postgraduate School, 1992-06)
The problem of roll, sway and yaw motions of surface ships is considered. A
mathematical model is developed which consists of the nonlinear maneuvering equations
and incorporates cross coupling between sway force, yaw ...
A correlation of welding solidification parameters to weld macrostructure
(Monterey, California. Naval Postgraduate School, 1992-06)
A 3-D finite difference model simulating single pass autogenous welds was used to predict the temperature fields in HY-80 steel arc weldments at various powers and torch velocities. From the predicted temperature field, ...
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