- General Changes
- Force Breakdown
- String Functions
- Obstacles
- Relative Motion
- Connectors
- Fatigue
- What No Longer Works
- What Answers Will Change
General Changes:
With this release, we are no longer supporting IBM RS6000 machines, and support for HP machines will be discontinued with REV 7.00.
- One can now use ED_ELEMENT and ED_CLASS during an INMODEL so long as the thing being edited has been defined.
- If one puts a blank line in a file, he no longer gets a list of the valid commands. The line is simply ignored.
- The wind force computations one gets when API is specified have been changed to comply with the 21 addition of RP2A.
- The code checking for a cone is now done in accordance with RP2A.
- A new command, &FILE, and a new string function &F_READ, have been added so that a user can now manipulate, open, close, read and write to files. Click Here to see the documentation, or Here to see a test.
- The options -CECHO, -QUERY, -MENCMD, and -COMO of the &DEVICE command no longer work, and the -USE_FILE option has been removed from the documentation. The work of this last option is now done with the &FILE command.
String Functions:
- New values: UPPER, LOWER, and SORT have been added to the string function &STRING.
- A new value, ATAN2 has been added to the string function &NUMBER.
- A new value, CDR has been added to the string function &ELEMENT.
- A new option, -PART has been added to the string function &COMPARTMENT.
Obstacles:
A new option, -OBSTACLE, has been added to the PIECE description. This allows one to define a piece which will hydrodynamically interact with the body. Click Here to see the documentation, or Here to see a test.
Fatigue:
Many aspects of fatigue have changed quite a bit. First, for BEAM or PLATE fatigue:
- Fatigue is now computed not only at the ends but at then ends of all segments.
an SN curve is associated with each fatigue point, and
an SCF is associated with each fatigue point.
You can now accumulate fatigue in the time domain as well as in the frequency domain. Click Here, to see how to define a duration for a time domain fatigue, and Click Here to see an example. Finally, there is now a &STATUS SN which will list the properties of the defined SN curves and the SCF reports now show the SN curve used and the SCF at the interior fatigue points. Click Here, to see an example.
Connectors:
A new connector, LMU, has been added. This is really a GSPR with the geometry of a cone/pin assembly. Click Here to see the documentation, or Here to see a test.
Also, the GSPR has been changed so that one can specify "friction". Click Here to see the documentation.
Relative Motion:
A command, REL_MOTION, has been added to the Process Post-processing Menu. Click Here to see the documentation.
Force Break Down:
In the past, the forces due to Coriolis Acceleration and Slam were computed globally for the body. When a stress analysis was performed, this force was inertia relieved out. Thus, these forces were not properly applied locally. This release fixes this problem. Now, the slam and Coriolis forces are properly applied to the members which generate them.
These two "new types" of force now appear when you do a &STATUS FORCE or ask for reports on the breakdown of the forces. In addition, you will now get A_INERTIA, C_INERTIA, and SKIN_FRI. These correspond to added inertia, contents inertia, and skin friction.
What No Longer Works:
For the moment, everything still works.
What Answers Will Change:
- Some answers may change due to the change in wind force computation for API wind treatment.
- The stresses and fatigue in cones will change.