Hi , I have a question about GRPOV/MEMOV cards , is displacement area overrides is the area that should be taken when calculating buoyancy for nonflooded members. the other question, I have two DEAD loads defined differently in terms of including marine growth . but the out put is the same for these two loads . does this sound right?. Also DEAD card would the weight of the structure included in the out put of the load. thanks for helping in advance. Regards Reem
Hi Reem,
Yes, the Displacement Area Overrides in the GRPOV/MEMOV is used for calculating non-flooded buoyancy.
Regarding the Marine Growth, it may be related to something else. How did you define the Marine Growth parameters in your model?
Regards,
Rafael Lara
Hi Rafeal Lara , thanks for your reply. Can you please clarify if overrides are used in calculating hydrodynamics only. for example density a section are overrides, are they used in calculating masses.
Regarding the Marine growth , it is defined as below
the two load cases are
Thanks for your support.
Reem
Yes, overrides in density will affect mass calculation.
Regarding the Marine Growth your input seems to be correct but there are much more that should be checked.
Could you please post the Seastate results for these two loads? You may want to look for the expressions below in your output file:
****** SUMMARY OF SEASTATE GENERATED DEAD AND BUOYANCY LOADS ******
Hi Rafael,
thanks for your reply.
1- why when i check some of the density overrides in the model I don't see them. for example group 80 has overrides 3 te/m3 for two of its segment as you see in the input file , but the group 80 in the model shows density 7,85 t/m3
2-Here are the results of sea state for both loads cases , i am confused with the element weight in load case 9001 , it is two small. , thanks
your help is appreciated .
thanks
1 - You will not see the overrides in the member properties. It will be considered later by Seastate program during the calculation. You may find references to the overrides in:
2 - Actually in the Load case 9001 Seastate should report 0 (zero) as the element weight since you are opting to consider Marine Growth weight only. I am not sure it is considering something else. Do you mind sharing the file so i can investigate a bit more?
Thanks Rafeal for your reply . i submitted a ticket through service request manager and attached the files. thanks