Good morning,
I created a barge model and I run seakeeping analysis on it in MOSES (meters and m-tons dimensions); now I need to evaluate the loads acting on the CoG of some items on deck (small jacket, piles ecc...), to use these values in a FEM analysis software to design seafastening and cribbing. I tried to evaluate these loads getting (on their CoGs) the RMS with ST_POINT, but they look very strong.
Reading forum and manual it looks that the right command to use in this case is FR_FCARGO (especially for g sin theta effect). What I'm planning to do is
- set the 10 years on RMS with &PARAMETER -PROBABILITY maximum 6.07
- specify FR_POINT
- and than FR_Fcargo
The results should be 3 forces in long. trasv. vert. directions in metric tonnes and these should be the design values to be used in FEM software.
Do you think this is a good way to proceed?
Thanks
Pietro
Hi Pietro,
I think the best way to do it is to let MOSES do the structural analysis. We have automated tools designed specifically for this. Please see the install.cif and install.dat file that come with MOSES. If you took the defaults when installing MOSES the files will be located in the following directory.
C:\Program Files\Bentley\Engineering\MOSES CONNECT Edition V11\hdesk\runs\samples\install
These tools were developed in the 1980's specifically for the offshore industry. The files have been in use since the 1980's. You can take the previous statement as they are also well tested. The MOSES team is here to help guide you with the automated tools.
If you feel strongly about proceeding with the method described you still need an st_fcargo command.
Georgina Maldonado
Hi Georgina,
Thanks a lot for your replay. I'll use st_cargo as soon I can, but of course my intention is to learn the structural part as well.
Thanks a lot
Hello Georgina,
I'm now using a trial version of Moses Edition V11.
Unfortunately, I am not getting this topic in the User Manual so I'd like to ask you if (putting a remote location point) are the accelerations result in the summary sheet including the g*sin theta effect?
If not how could I evaluate these accelerations?
thanks
You need to use the st_fcargo command. Please see the FAQ at the following link.
https://communities.bentley.com/products/offshore/w/wiki/28622/output-report-cargo-g-force-statistics
Please let us know if there are other questions.
Dear Georgina,
Sorry if I was not clear.
What I would say is, working in version 11 of MOSES MOTION and setting a remote location point in the input sheet, is it possible the see its acceleration (comprehensive of g*sin theta effect)?
If not, is using MOSES EXECUTIVE (FR_Fcargo command) the only way to do that?