600 GHS Damage Stability
Damage stability requires the ability to damage individual compartments for free flooding. This section describes how to damage compartments, combine that into a full damage stability analysis, and then covers probabilistic damage stability.
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610 GHS Damaging Compartments
How to damage compartments in GHS. This includes flooding compartments and restoring them to intact status.
Homework 611 shows the various ways to damage compartments. This is a simple homework. Damage a few compartments, using the TYPE command. And restore those compartments intact. Download includes homework files and solution.
620 GHS Determinisic Damage Stability
The general steps necessary to perform a deterministic damage stability analysis in GHS. This provides a summary of the process. Many of the individual commands for a damage stability analysis were covered in previous tutorials. This tutorials mainly shows how to combine those commands for a damage stability analysis.
Homework 621 shows how to create a deterministic damage stability analysis. The homework specifies a few simple size parameters for the assumed extent of damage. These are just convenient for the homework assignment. They are not based on any regulations. From this extent of damage, you must use the included general arrangement to develop a series of damage cases. And for each damage case, you must enter the commands to damage the tanks, equalize the vessel, and run a GZ curve to evaluate against stability criteria. Download includes homework file and solution.
630 GHS Probabilistic Damage Stability
Probabilistic damage stability was introduced by the IMO as a new method for damage stability assessment. This method was specifically designed to work with computer automated stability software. The people at Creative Systems developed a wizard that iterates through all calculations necessary for a probabilistic stability analysis. This tutorial provides the outline for how to use that wizard.
Homework 631 basically states that you should work through the GHS training manual on probabilistic damage stability. This is only worth doing if you have the license to use the wizard. There are several methods to go about using the wizard. I suggest you explore the various methods and get comfortable with how to use the wizard. Download includes the GHS training manual.
640 GHS Floodable Lengths
Floodable lengths is a simplified damage stability analysis normally used at the preliminary stage of a vessel design. The analysis is usually used to determine internal compartmentalization for the vessel. The strength of the analysis is that it doesn’t require any internal compartment definitions. This tutorial shows how to use the floodable lengths analysis in GHS.
As a preliminary, the floodable lengths analysis does require that a margin line is defined in the GHS geometry file.
Homework 641 shows how to develop a GHS floodable length curve. Download includes homework file and solution.
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