I was thinking about envelopes, but that would be too imprecise
Then applying it to a cylinder in the 3D effect (classic)
But I think, maybe a blend can do.
You draw a thin dashed line and then a thick one and then blend between them. Adjust the number of steps so that it matches.
Outline the blend and the lines when done.
Another way: Effect menu > Distort and Transform > Transform.
The selection in the screenshot is a group. Its width is 24 mm.
Exactly, thank you very much!