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3D Arc Truss (ABAQUS)

3D Arc Truss (ABAQUS)

3D Arc Truss (ABAQUS)

(OP)
I am having some trouble with creating an appropriate ABAQUS model for the analysis of a large 3D arc box truss of the AT&T Stadium.

I have created a single PART for a box truss unit and I am trying to use the “radial pattern” tool in ASSEMBLY to repeat this unit roughly 46 times across a circular radii of 312 metre. When using the “radial pattern” tool, I cannot find the way to change the “centre of rotation” point and do the radial pattern produced is defaulted to a small circle. Also, I cannot seem to make the instance rotate on the appropriate axis as seen in the real life photograph of the truss as seen attached.

Additionally, once I figure out how to customise the radial pattern appropriately I must consider each nodes and ensure there are no overlapping or disconnected bars. I believe there is a “merge” option that will ensure this is not an issue. Furthermore, I need a way to overcome the small gap between each truss unit as it is square units copied around the diameter of a circle – is there a connection or additional member I must place between each to ensure the truss is correctly modelled without this small gap between each?

RE: 3D Arc Truss (ABAQUS)

(OP)




RE: 3D Arc Truss (ABAQUS)

Hi,
I don't know if it matters or not but you might want to remove some of the information about exactly what structure it is (drawings and photos)(FEA figures are okay). I myself would not show that.

I'm guessing now but I think CAE should ask for an axis of rotation (or two nodes that goes through the axis of rotation). Enter them by coordinates below the viewport. Just a guess.

/S

RE: 3D Arc Truss (ABAQUS)

a) Create datum axis as needed in the Assembly module and refer to them as rotation axis for the radial pattern.

b)Do I see that right? You have a single structure with something like straight outer faces and you want to create a curved structure with these regions? I think it is pretty obvios that this will not fit. A merge/cut would not help. Change the regions, so they fit together.

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