What type of displacement is required for a suspended load?

Simulation Generality
1

Hello

Quick question: I am looking to carry out a static analysis for a handling system (vacuum lifter) suspended by 4 shackle + sling type attachment points, I wanted to know which type of imposed displacement is the most appropriate?

I didn't represent the shackles and create an imposed displacement of the fixed pivot type at the level of my holes, is this correct? I'm afraid that I have "restricted" my study too much.

Thank you in advance,

2

I would have done the same thing since the efforts will go back through the fixing holes!!

3

In fact, I have a doubt because I think that the closest thing to this kind of configuration (with shackle), is a ball joint-type link, I would have to release more rotation because with a fixed pivot, I limit the deformation of my system. (I guess my arrow would be bigger)

4

For my part I make ball joints on each side of the shackle and chain, which gives more the reality of the movement and the "unplanned" displacements

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5

In any case, the load has a vertical downward reaction so the difference should not be huge, unless your portic moves to the side and there is an unbalanced effect!!

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6

The reaction on the shackles will only be vertical if the slings are also vertical. If the slings return to a common point (hook) there will also be a horizontal component.

Can we get a view of your system?

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7

An image of the system would be welcome to answer the question.

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8

Hello gentlemen and thank you for your answers,

It's true that I should have illustrated my words to you but I still have a little trouble with the use of lynkoa. Sorry.

After some research, it turns out that for a static volume study on Solidworks Simulation, it is not possible to create a "ball-joint" connection. This is only possible for shell elements.

This is related to the capability of the solver. This type of imposed displacement would imply too many degrees of freedom for the solver.

So I used an advanced imposed displacement "Use a reference geometry" when selecting my cylindrical faces, and I forbade the normal translation to the reference plane. So my reaction forces are vertical, which suits me perfectly!!

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9

@ Kevin if you have solved your problem put it in solution

@+-))

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