Ring geometry in 3DEC7

3DEC
1

Hi all,
I am trying to create a ring geometry in 3DEC 7. I am deleting the inner cylinder from an outer cylinder but the resulting deleted block geometry is not smooth and has some blocks left. I have tried deleting by range position grouping and by joint set which has resulted in many new joints. Kindly suggest how to get a smoother geometry.

geometry generate cylinder base 0,0,0 height 0.027 radius 0.027 axis 0,0,1 resolution 0.001
block generate from-geometry minimum-edge 0.0005 maximum-edge 0.006 ;1942 blocks generated

block
block1161×736 49.6 KB

block delete range cylinder end-1 0,0,0 end-2 0,0,0.027 radius 0 0.005

2

The geometry of the inner cylinder isn’t actually contained within your model currently, you are just using the block delete command with a range argument that will select blocks with centroids within that cylinder range. Hence blocks with centroids outside of that range are not currently being deleted, and therefore not leaving a cylindrical profile.

To get a “smooth” inner cylinder, you either need to have that inner cylinder in your geometry before you generate the blocks, or undertake block cuts to form it.

I would suggest reading the documentation sections on model generation and generating block assemblies.

3

Thanks for the input. By going through documentation I think maybe the tunnel command will work.