Cd.14 Vessel Structural Conditions

I - GENERAL STRENGTH PRINCIPLES EXPERIENCED ON A SHIP STRUCURE

1. Which is the correct Hierarchy of Hull Strength Members?

• plate, stiffeners, girders, tank, hull girder

2. Which of the below structures of bulk carriers are considered critical?

• the upper and lower connections of main side frames are structures considered critical in bulk carriers

3. Click the different ship conditions and text and drag them, by moving the mouse, to the corresponding beam. Click the continue-button when finished

4.What is the purpose of the girders in the tank?

- support the stiffeners and take up some of the sea forces

II - EXTERNAL AND INTERNAL FORCES EXPERIENCED ON A HULL STRUCTURE

1. What is the difference between static and dynamic forces on a ship hull?

- Static forces are set up by the cargo and the sea, and dynamic forces are set up by the sea (wave-action)

2. Will the internal and external forces acting on Bulk Carrier Cross Section change during loading?

- Yes, the internal forces from the load and the sea water pressure will increase during loading

3. What is the worse case consideration for the hull girder at sea?

- When the wave length between the crests is approximately equal to the length of the ship

4. What type of dynamic forces may cause indent in plating on forecastle deck and main deck in way of pillars inside forecastle?

- Pressure forces caused by green water on deck

III - COMBINATIONS OF STRENGTH OF STRUCTURES AND FORCES ON DIFFERENT SHIP TYPES.

1. When does a bulk carrier experience extreme tension in bottom structure during fast rate loading?

• during fast rate loading of heavy cargo in mid-ship holds

2. Point and click at the critical area, most subjected to cracks in the bottom web frame in the oil tanker.

3. Point and click at where the largest forces are transferred from the girders to the transverse bulkhead.

4. Point and click at the hard points where cracks may appear in the transverse web frame ring in single skin oil tanker. Click the continue when completed

5. Point and click at the most stressed area of the horizontal stringer in bow area in a cargo vessel

IV. ANATHOMY AND CRITICAL AREAS OF DIFFERENT SHIP TYPES

1. Point and click at, at least five of the most critical areas in an oil tanker. Click the continue button when completes.

2. Point and click at, at lest four of the most critical areas in bulk carrier. Click continue button when completed.

3. Point and click at, at least four of the most critical areas in a gas carrier. Click the continue button when completed

4. Point and click at, at least three of the most critical areas in the RO-RO and/or Ferry. Click the continue button when completed.

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