It may be that I have to consider effects of ship movement on a compressor and its piping. There are several vertical components in the system (vessels) which are well above floor level. I assume that ship movement (pitch and roll) may result in a significant load on the mechanical system.

Does any of you have experience in how to deal with this? I see load cases for wind, earthquake, etc. but not for ship movement. Are there any workarounds for this in CII, or should I translate masses plus acceleration into a static (maybe low freq dynamic?) force and apply it to the model?

Any help or suggestion is appreciated.