GHS
FAQ
Proper
use of the SOLVE with the RA command
Question
QA022 :
When does SOLVE need to preceed the RA command ?
Answer :
The RA command starts the curve at the present heel angle.
For example,
ANGLES = 0, 5, ... 60
HEEL = 7
RA
will run the curve of righting arms at 7 degrees, 12 degrees,
etc.
The SOLVE command finds equilibrium for the present loading condition.
This may result in a heel angle which is not zero. Therefore,
HEEL = 0
RA
and
SOLVE
RA
may result in different angles being used.
IF you have a LIMIT such as
LIMIT AREA FROM 0 TO 40 > 10
the angles "0" and "40" will be relative
to the starting angle.
If your LIMIT is
LIMIT AREA FROM ABS 0 TO ABS 40 > 10
the angles will be relative to upright.
There is no need to SOLVE before RA unless you want the RA curve
to start at the angle of equilibrium. |