Group Abstract Group Abstract

Message Boards Message Boards

Optimization using Nminimize

Gowtham A
Posted 6 years ago

Hello all,

I have the following equation:

enter image description here

The terms A11i and rest varibales have R0 and Ri as input.

I want to optimize and get the maximum value for that expression. I want to see corresponding R0 and Ri.

I tried to run the program and I got the following error

"The following constraints are not valid: {0,0.004<=Subscript[R, \
i],1/125<=Subscript[R, o],Subscript[R, i]<=0.006,Subscript[R, \
o]<=1/100}. Constraints should be equalities, inequalities, or domain \
specifications involving the variables"

Could anyone please let me know what could be the possible error.

Regards, Gowtham
POSTED BY: Gowtham A
3 Replies
Sort By:
Gowtham A
Gowtham A
Posted 6 years ago

hey @Mariusz. I can understand. I tried to paste my codes, but the codes were in rawinput form which was getting difficult to read. That's why I posted an image and I don't mind sharing my file. You can find it in the attachments.

So the equation Wext gives certain deflection value. I want to get the maximum value of that for the given range of other variables Ro, Ri , tpz and other variables.

I tried some code and it seems the values for Ro and Ri always gives higher values of it which I believe is not correct.

Please check my code and give me your input if youve one.

Thank you.

Regards, Gowtham

Attachments:
graph learn.nb
POSTED BY: Gowtham A
Jim Baldwin
Jim Baldwin
Posted 6 years ago

Ditto on what @Mariusz Iwaniuk says.

From the image it appears that r=0 is used when that should be r==0. However, why not just set r to zero?
POSTED BY: Jim Baldwin
POSTED BY: Mariusz Iwaniuk
Reply to this discussion
Community posts can be styled and formatted using the Markdown syntax.
Tag limit exceeded
Note: Only the first five people you tag will receive an email notification; the other tagged names will appear as links to their profiles.
Reply Preview
Attachments
Remove
or Discard