Hello,
i would like to get your idea, on how to put the correct entries (fixture, force, etc...)
to get this simulation the most realistic as possible.
In a previous simu-study (not made by myself) they put "full fixture" at the 4 bottom joints.
in my opinion the approach methodoly is wrong, because each joint will no be able to rapproach each overs.
because each joint will not move from the others, their positions stay "perfect" without any move in X of Z.
(Y is the elevation).
i would like to try the approach of fixing the top, by simulating the "slings",
but with the possibility to slightly deform the frame in X-Z posiiton.
like a plastic bucket full of water, if we lift it, it will deform a little.
And what kind of fixture setting to get a realistic move / lifting ?
i can't give the PRT file.
(sorry for my english, it's not very good).
Have you tried a rigid link to a common point (hook on the slings at a defined location) and then constrain that point? I presume you are trying to analyze the frame with those connection points not just the connection fixture itself. (Based on the HSS geometry it appears as if this will end up being a weldment.)
Another way is to constrain a section (45-60°) of the cylinder using split surface solely in the direction of the sling (you can't push a rope) and then add your load and gravity in the appropriate direction. That is probably the better way IMHO.