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General HydroStatics
Ship Stability Software |
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Command of the Week
(New or interesting aspects of GHS that you may not know about) |
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ADD REPORT (review)
(Requires GHS 15.0 or later) |
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Last week's COW on the WEIGHT command made reference to the ADD command,
which is the usual means
of introducing fixed weights.
The simplest form of the ADD command adds a point weight at a given center of gravity. For example, adding one ton of crew and effects, ADD "CREW & EFFECTS" 1.0, 35.0f, 0.0, 12.0Larger weight items might be distributed (for the purpose of strength calculations). The ADD command provides a convenient way of spreading a weight uniformly over a longitudinal distance: ADD "NETS" 15.0, 20.0a, 0, 17.0 /LENGTH:20.0If a more detailed distribution is desired, a weight curve can be specified: ADD "ICE" 0.15@55f, 0.3@23f, 0.2@22f, 0.1@40a, 0, 10.0(This one has four points. Many more can be given.) Or if a simple trapezoidal distribution will suffice where the center and ends are known, let the program find the densities: ADD "RATS" 0.1, 0, 0, 3 /LENGTH:40f, 30aThe STATUS command provides a report of these "fixed" weight items, but only the center of gravity is mentioned -- nothing about the longitudinal distribution. If you want to show the distribution, the ADD REPORT command does it. Below is a comparison: first the STATUS FIXED output then the ADD REPORT output. |
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Questions, comments, or requests?
Contact Creative Systems, Inc. USA phone: 360-385-6212 Fax: 360-385-6213 Office hours: 7:00 am - 4:00 pm Pacific Time, Monday - Friday Mailing address: PO Box 1910 Port Townsend, WA 98368 USA Click here for an index to this and previous COWs |