A BULBOUS BOW DESIGN METHODOLOGY FOR HIGH-SPEED SHIPS
A methodology for designing bulbous bows for high-speed, fine-form ships is proposed. Using the Kracht bulbous bow design curves developed for low-speed, full-form ships as a starting point, a series of bulb forms is developed and analyzed, using a combined numerical and experimental approach to ascertain resistance and seakeeping characteristics. This study was performed using the FFG-7 class of naval frigates as the reference hull form. Nine variations in bulb design plus the bulbless hull form were analyzed, using the DTNSRDC's XYZ Free Surface Program. Five of the bulb variations were appended to a model of the FFG-7 and tested in the 116-m (380 ft) towing tank at the U.S. Naval Academy. The results from the computer predictions and the calm-water towing tank tests show remarkably similar trends, while the relative rankings of the bulb forms derived from these analytical procedures were identical. Furthermore, the addition of a bulbous bow to the FFG-7 hull form appeared only marginally to degrade the ship's seakeeping characteristics.
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Supplemental Notes:
- Transactions paper
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Authors:
- Hoyle, J W
- Cheng, B H
- Hays, B
- Publication Date: 1986
Media Info
- Features: References;
- Pagination: 19 p.
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Serial:
- Society of Naval Architects and Marine Engineers-Transactions
- Volume: 94
- Issue Number: Preprint No.1
- Publisher: Society of Naval Architects and Marine Engineers
Subject/Index Terms
- TRT Terms: Bows
- Uncontrolled Terms: High speed vessels
- Old TRIS Terms: Bulbous bows; Design process; Thin ships
- Subject Areas: Marine Transportation; Vehicles and Equipment;
Filing Info
- Accession Number: 00651166
- Record Type: Publication
- Source Agency: Maritime Technical Information Facility
- Files: TRIS
- Created Date: Jul 21 1994 12:00AM