Variable buoyancy device
First Claim
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1. A method of optimizing the compressibility and pressure resistance of an ocean submersible vehicle to minimize the work required to change depth, said vehicle having a vertical ascent and descent cycle, comprising the steps of:
- forming a hollow pressure resistant hull constructed of a plurality of layers, each said layer comprising a plurality of strong and stiff linear fiber filaments embedded in a matrix;
forming each said layer by winding said filaments in a helical pattern at a desired winding helix angle, said helically wound filaments having a different stiffness in an axial and a circumferential direction;
adjusting the helix angle to obtain a division of load axial and orthogonal to the filaments to obtain a desired overall hull compressibility; and
adding sequential layers.
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Abstract
The method of constructing a hull for ocean profiling or gliding vehicles which reduce the energy required to make vertical excursions. Composite materials are used in constructing the hull, specifically a fiber reinforced matrix, wherein the choice of the fiber material and orientation allows a balance of strength and elastic properties optimized for oceanic profilers and gliders thereby allowing operations with minimum energy expenditure.
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Citations
5 Claims
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1. A method of optimizing the compressibility and pressure resistance of an ocean submersible vehicle to minimize the work required to change depth, said vehicle having a vertical ascent and descent cycle, comprising the steps of:
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forming a hollow pressure resistant hull constructed of a plurality of layers, each said layer comprising a plurality of strong and stiff linear fiber filaments embedded in a matrix; forming each said layer by winding said filaments in a helical pattern at a desired winding helix angle, said helically wound filaments having a different stiffness in an axial and a circumferential direction; adjusting the helix angle to obtain a division of load axial and orthogonal to the filaments to obtain a desired overall hull compressibility; and adding sequential layers. - View Dependent Claims (2, 3, 4, 5)
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Specification