GHS Port Reference Center
Information for maritime designers, engineers and builders Maintained by Creative Systems, Inc., Creators of GHS Click here for information about GHS and other fine marine software. |
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`Demonstrates using GHS to figure out where a drydock will sink down to. `When the flood valves are left open the tanks will load to the `bottom of the air vents in each ballast tank. proj bubble `Make a simple hull with tanks: enter pm create hull ends 0 100 out 10 top 10 bot 0 / create tank1.c ends 30 50 fit hull.c / create tank2.c ends 50 70 fit hull.c / write bubble.gf quit pm `Establish light ship: depth 5 vcg 5 solve weight, lcg tank * `<-- selects all tanks type bubble `The point of flooding/venting is represented by the reference point: ref top `Reference points at top ref * * 6 `Now lower the vertical coordinate to vent bottom. `Since the tanks will not flood until the water level is at or above the `reference points, we have to load them to that point explicitly. This `also establishes the 1-atmosphere air volume: load ref:0 `Now solve for equilibrium and report the status: solve status load |
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