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1. (WO2014203742) INDEPENDENT TANK WITH CURVATURE CHANGE SECTION, AND MANUFACTURING METHOD FOR INDEPENDENT TANK

Pub. No.:    WO/2014/203742    International Application No.:    PCT/JP2014/065018
Publication Date: Thu Dec 25 00:59:59 CET 2014 International Filing Date: Fri Jun 06 01:59:59 CEST 2014
IPC: B63B 25/16
F17C 3/00
Applicants: MITSUBISHI HEAVY INDUSTRIES, LTD.
三菱重工業株式会社
Inventors: OHTSUKA, Hirotomo
大塚 浩友
MIYAZAKI, Satoshi
宮崎 智
WATANABE, Michihisa
渡部 亨尚
Title: INDEPENDENT TANK WITH CURVATURE CHANGE SECTION, AND MANUFACTURING METHOD FOR INDEPENDENT TANK
Abstract:
Provided is an independent tank, and a manufacturing method therefor, for which local bending stress arising near a boundary section (welded section) can be reduced without increasing plate thickness. An independent tank (1) has at least one curvature change section in which the curvature along the axial direction of plate members (2, 3) that form the tank changes along the axial direction. Both the inner peripheral surface and the outer peripheral surface of the plate member (2) on the small curvature side are not flush with respect to the inner peripheral surface and the outer peripheral surface of the plate member (3) on the large curvature side. The plate thickness center of the plate member (2) on the small curvature side is offset toward the radial direction inner side or the radial direction outer side with respect to the plate thickness center of the plate (3) on the large curvature side.