I am trying to build my container model and running a static analysis on it. The requirement is that I need to show stresses and deflection of the container and equipment while it is at tiedown provision state. The situation for tiedown is 2G at transverse, 4G longitundinal and vertical. The question is that do I:
1) model the equipment as MASS element (kg), giving them various mass and running the analysis with 4 times the BODY LOAD (9810mm/s2 X 4) vertical or longitundinal or 2 times (9810mm/s2 X 2)the BODY LOAD transverse?
2) model the equipment as LOAD (Newton), giving the equipment 4 times the load (load X 4) or 2 times the load (Load X 2)?
Thanks for your time.
I've seen a lot of analysts apply a 1g load in each direction, then in FEMAP, use output set combinations to combine them with any factor you want. I am assuming you're doing a linear analysis, where a linear combination of results will be acceptable. In v11.2, there's virtual linear output set combinations where everything is done on the fly, you just specify the factors on the base output sets.
The approach to use to model the equipment as mass or equivalent force is depending of your needs, and the type of analysis to perform:
I always suggest to use mass elements instead forces, this is more efficient, and give you freedom to run static & dynamic analysis using the same FE model.