Technology and Operations
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Re: Pressure Hull Material
Posted by:
Scott Sorenson
()
Date: September 16, 2008 02:05AM
Tlhert,
Th following is for the hulls Types IXC, IXC40, IXD2, XB, and XXI. This will be long so I will do in parts. I just got in from Japan today so this first part will be short.
The vessel consists of a cylindrical pressure hull with truncated conical sections at the ends and cast end bulkheads, a conning tower of oval horizontal section with a cast top, a system of exterior ballast and fuel tanks enclosed in a ship-shaped envelope, and a light superstructure with acconpanying conning tower fariwater and bridge. A box keel is fitted below the pressure hull. The designed submergence depth is 100m (328').
The cylindrical pressure hull has a diameter of 4400mm (14.42') and is made of 18mm (.73") steel with inside buld tee frames 200 X 11 (7.88" web depth X .43" web thickness) on 700mm (27.56") centers. The plating is gradually reduced throughout the tapered sections fore and aft to 16mm (.63"), and the frames are correrspondingly reduced to 130 X 9 (5.12 X .35"). Frame spacing remains unchanged in the tapered sections.
The specification for the pressure hull plating and frames calls for a tensile strength of 74000 psi with a yield point of 51300 psi. The steel is known as No. 52; the specification for plates is KM 9104, and for frames is KM 9103.
Framing is modified in the way of the main motorss, to provide clearance by substituting double frames 160 X 9 (6.30" X .35") for the normal 200 X 11 frames.
More to come tomorrow, time for bed.
Th following is for the hulls Types IXC, IXC40, IXD2, XB, and XXI. This will be long so I will do in parts. I just got in from Japan today so this first part will be short.
The vessel consists of a cylindrical pressure hull with truncated conical sections at the ends and cast end bulkheads, a conning tower of oval horizontal section with a cast top, a system of exterior ballast and fuel tanks enclosed in a ship-shaped envelope, and a light superstructure with acconpanying conning tower fariwater and bridge. A box keel is fitted below the pressure hull. The designed submergence depth is 100m (328').
The cylindrical pressure hull has a diameter of 4400mm (14.42') and is made of 18mm (.73") steel with inside buld tee frames 200 X 11 (7.88" web depth X .43" web thickness) on 700mm (27.56") centers. The plating is gradually reduced throughout the tapered sections fore and aft to 16mm (.63"), and the frames are correrspondingly reduced to 130 X 9 (5.12 X .35"). Frame spacing remains unchanged in the tapered sections.
The specification for the pressure hull plating and frames calls for a tensile strength of 74000 psi with a yield point of 51300 psi. The steel is known as No. 52; the specification for plates is KM 9104, and for frames is KM 9103.
Framing is modified in the way of the main motorss, to provide clearance by substituting double frames 160 X 9 (6.30" X .35") for the normal 200 X 11 frames.
More to come tomorrow, time for bed.
