Dear All members,

I have one vertical vessel(for FPSO or semi FPSO) with 4 support lug. could any one guide me how to design support lug when this vessel have inclined around 22.5 degree.

appreciate if any one could guide me.

Thank you.

_________________
Faizol
(PV-elite User)

There is some basics
Be specific you have asked for LUG SUPPORT and not lifitng lugs.
For lug supports.
if Q is verticale load of vessel per LUG.

Then Qa = AxialLoad = Q sin theta
& Qb = Bending lod = Q cos theta

Where theta = for normal vessle is 40 to 50 deg if tilted vessle add that much degree which resulted in More Lenght of gusset plate.

_________________
Niraj

Dear Niraj,

sir, thank for your reply, i know that is a basic calculation for load but how to relate with support lug thickness? i mean that how to calculate the support lug thickness due this load. Appreciated if you have and share manual calculation with me.

Thank you.

_________________
Faizol
(PV-elite User)

Faizol,

After you resolve forces considering equipment tilt, procedure for calculation remain same.

Only forces & moments acting on support lug/ bolts and equipment change due to the equipment tilt.

Regards

Dear Sanjeev,

Sir, you have example calculation for this case. kindly share to me to study because i'm not deeply understand to solve this problem. Plese email to me at faizol@mset.com.my.

your prompt respond are appreciated.

Thank you.

_________________
Faizol
(PV-elite User)

Dear Faizol,

since you have posted in the VIII-1 Forum I suppose you are interested what happens in your shell, considering the above mentioned loads. Once you have determined them you have the possibility to add clips (in any case Compress calls it "clips", I think PVElite too) to your vessel and you will get the stresses according to WRC.

Michael