LO3

Question 1

What shearing forces and bending moments might occur in a ship’s
structure in still water?

Answer 1

A ship will experience shearing forces and bending moments as a
consequence of uneven distribution of weight forces and
buoyancy forces acting along its length.

Question 2

What shearing forces and bending moments might occur in a ship’s
structure when at sea?

Answer 2

the ship will bend like a beam. It may be considered as an H-girder with deck and bottom shell plating forming the flanges. this is when hogging and sagging are more likely to occur.

Question 3

For a modern container ship, describe how torsional stresses might arise when floating in still water?

Answer 3

The loading of weights in forward port holds and starboard aft holds or vice-versa in still water.

Question 4

For a modern container ship, describe how torsional stresses might arise when floating in sea water?

Answer 4

The oblique approach of waves at sea causing cyclical torsion stresses to port and starboard as the waves pass the ship.