Problem

Issues with stability calculations.

Solution

1. Tank modelling

Common issues:

• Check each section of your model if the tanks are formed properly.
• Check the volume of each tank if its value is as expected.
• Only compartments and non-buoyant volumes or tanks can overlap with each other. Tanks or compartments of the same type (e.g. two tanks) can not overlap. A tank and a non-buoyant volume are also not allowed to overlap. Stability will first try to form tank sections and then check whether these sections overlap tank sections of adjacent tanks. When two conflicting or overlapping tanks or compartments are detected during the forming process, you will receive an error message. The fixing procedure of overlapping tanks is available in Stability manual p. 70.

2. Loadcase definition

Make sure that at least one loadcase is defined. Loadcases define the loading condition of the vessel. Static weights that make up the vessel lightship are specified here as well as tank filling levels, expressed as either a percentage of the full tank capacity or as a weight.

3. Stability criteria not defined

See Stability Criteria Approach

See Also

Crash Occurs During Analysis