| 摘要 |
A LNG tank for ships having a heat insulation material applied over the outer circumference thereof, said tank being supported on a ship hull via a vertical cylindrical skirt, wherein a portion of the tank above the equator is formed by a cylinder and by a top portion of the head structure with a upward convex portion, said head structure being arranged above the cylinder, and another portion of the tank below the eqautor is formed by a part of the sphere having a radius substantially equal with that of the horizontal section of the equator substantially up to the range of the lat. 30 DEG , and the remaining portion of the tank further below said range is formed by a flat semi-spherical hull structure which is a part of the laternally elongated ellipsoid of gyration or semi-ellipsoid and having the aspect ratio of substantially 1.5. |
