GHS Wind-Heeling Band Method Test Cases

Results of using the BAND method of calculating wind heeling moments are presented here, where the vessel is made up of one or two vertical cylinders.

The first case involves a single cylinder having a vertical axis at zero heel. Theoretically, due to its symmetry, the heeling moment curve should be the same regardless of the direction of the heeling axis.

The next case uses two cylinders in the same Part. They are offset transversely so that at the normal zero-axis direction of heel the starboard one entirely masks the port one and they appear as one cylinder. As the direction of heel moves away from zero axis, the two cylinders become more distinct until at the 90-degree axis they are entirely separate.

Finally, the same two cylinders are placed in separate parts so that even at zero axis there is no shielding and they both contribute 100% to the wind plane. Note that this is not simply the same as the single cylinder doubled until it gets to the 90-degree axis because the buoyancy of the system is different.

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