Array of objects

Coreform Cubit Geometry
#1

Is there a function in Cubit that allows the user to create an array of a single object in cartesian coordinates?

#2

Hi,

I’m going to need a little more description here. Do you mean like a numpy array of coordinates? Do you mean like a copied pattern of geometric objects? I’m not clear what you are asking for.

Thanks,
Karl

#3

Thank you for responding to my question. Yes I would like to make multiple copies of a single geometric object distributed in space by a constant x,y,z spacing, or by a analytical function.

#4

For a simple x, y, z spacing you can use a copy transform operation with the repeat operation. For example,

create cylinder radius 2 z 5
volume 1 copy move x 15 repeat 5 
volume 2 to 11 copy rotate 30 about z repeat 11

Cubit has some mathematical functions called APREPRO in its native command language but in general I find it easier to use python.

import numpy as np

cubit.cmd('reset')
radius = 2
height = 5
cubit.cmd(f'cylinder radius {radius} z {height}')
x =np.array( [i for i in range(0,360,30)])
y = 20*np.cos(x*np.pi/180)
xy = [ (x[i], y[i]) for i in range(0, len(x))]
for val in xy:
   cubit.cmd(f'volume 1 copy move x {val[0]} y {val[1]}')
cubit.cmd('delete volume 1')
cubit.cmd('compress')

Do these examples help with how to create patterns of objects with Cubit?

Thanks,
Karl

#5

Awesome! Thank you very much for confirming that it can be done, and especially for providing an example of how.