Ship Stability Software
Command of the Week
(New or interesting aspects of GHS that you may not know about)
(Requires GHS with Crane Module)
While the BOOM command is a convenient means of
locating the weights of various crane elements—converting
locations you give in crane coordinates into ship coordinates—it
is only one step of many needed to completely model a real-world crane.
The Crane Module and specifically the CRANE.WIZCO wizard makes the task of crane modeling relatively easy. It accommodates pedestal-mounted cranes as well as cranes based on the deck, providing several ways of distributing weights for shear and bending calculations. Knuckle booms as well as fixed-angle jibs are handled. Multiple hooks are provided for.
A nice feature of the Crane Module is the manipulation of graphics to give visual verification of load locations.
Here's the opening dialog of CRANE.WIZCO:
|The green button brings up the main setup dialog for defining all the relevant details of geometry, weights, and capacity tables:|
|A separate capacity table for each hook is provided for:|
|The Crane Module can create a graphical representation of the boom and quite a few other details as well:|
|Useful output at a particular condition is presented in the Load Editor:|
|Several stability criteria are available:|
|Also available is a table showing results over a range of azimuth angles:|
|For what it's worth, the Crane Module will draw the locus of the hook at a given boom elevation angle:|
|It's fun to play with the dialogs and try things out. Just in case documentation is needed, the Crane Module manual is available.|
Questions, comments, or requests?
Contact Creative Systems, Inc.
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