[ATM] SEC: UNCLASSIFIED:-Plop help

[jonah at eecs.berkeley.edu (Jeff Anderson-Lee)]

Andrew.Martyn@defence.gov.au wrote:

>Can someone please tell me the input parameters for plop for the 6 point
>mirror cell design that has 1 point at the centre and the other 5 on a ring
>around the centre. My efforts keep resulting in errors.
>

Ahh.  That's a fun one.  The trick is you can't have a support ring with 
just one point,
or at offset 0, so you make one with 5 points, each with a relative 
force of 0.2 at offset 0.001R.
Generating parts is also tricky, as you need to aggregate the central 
points into one locus in order
to get the right balance from Plop.

Jeff Anderson-Lee
Sacramento, CA
--
; "6 point" cell with one "point" at center
var r0  0.001
var r1  0.772534
diameter 254
thickness 25.4
density 2.23e-06
modulus 6400
poisson 0.2
f-ratio 5
n-mesh-rings 20
rel-support-radii r0 r1
rel-force 0.2 1
num-support 5 5
support-angle 45 45
basis-ring-size 5
basis-ring-min 0
optimize r1 0.01
part bar 1 point 1 3 point 1 4
part bar 1 point 1 1 point 1 2
part triangle 1 point 0 0 point 0 1 point 0 4
part triangle 1 point 0 2 point 0 3 part 2 0
part bar 1 point 1 0 part 3 0