In this paper we investigate the resistance and seakeeping effects of an inverted bow by comparing the motions of an existing combatant hull, the Oliver Hazard Perry class frigate (FFG-7), with a modified version of the hull with an inverted bow. The bow of the FFG-7 was redesigned by developing a set of basic curves that define the parametric surfaces of the new shape. Two 1/80th scale models were tested for resistance in calm water and seakeeping in both regular waves and irregular head seas. The differences between the FFG-7 and the inverted bow responses are characterized in terms of pitch and heave motions and vertical accelerations.
Keywords:
frequency,
time history,
irregular wave,
heave motion,
transfer function,
hull,
energy spectrum,
spectrum,
us government,
variance
Subjects:
Information Management and Systems
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2015. The Society of Naval Architects and Marine Engineers
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