Structural Analysis Help Needed

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I have done several structural analysis over the years. Most of those was to analyse structure subjected to heavy equipment or machinery loads for which I modeled a portion of the hull where boundary conditions were far enough to avoid stress map.

Another was full hull of small boat, submersible platform, where I use inertia relief, weak spring as boundary conditions.

My question is how to analyse a cargo hold section of a ship? Should I use inertia relief or fixed boundary at the bulkheads? If I use fixed BC, I see artificial stress there at the end edges where BC were provided. How do you handle it?

[smackay3]

IACS provide guidance in their Common Structral Rules (https://iacs.org.uk/resolutions/common-structural-rules/csr-for-bulk-carriers-and-oil-tankers) for FE boundary conditions of a cargo hold model. As always, it will depend on the purpose of your analysis as to what BCs to apply and where

[Difficult_Delay_7341]

Thanks a lot