A transverse section of amidships is subjected to static pressure due to the surrounding water as well as internal loading due to the weight of the structure, cargo, etc.If the weight amidships exceed the buoyancy or when the wave trough amidships the ship will sag, as a beam supported at a ends and loaded at mid length.If the buoyancy amidships exceed the weight due to loading or when the wave crest is amidships, the ship will Hog, as a beam supported at mid length and loaded at the end.Depending upon the direction in which the bending moment acts the ship will Hog or Sag.The forces are two in number, the weight of the ship and all that it carries acting down wards and the vertical component of the hydrostatic pressure.The greatest stress set in the ship as wholes are due to the distribution of load along the ship, causing longitudinal bending. The dynamic forces are cause by the motion of the ship at sea and the action of the wind and wave. The static forces are due to the difference in the weight and buoyancy, which occur through out the ship. The forces acting on a ship may be static or dynamic. The modern ship is made up steel plating, section and builds up girders so connected as to provide adequate strength in all parts to withstand the forces acting on the ship under all condition of service.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |