solving nonlinear equations in matlab

hello,

I have problem about an equation. I would like to solve this eqution in matlab as input value P and I want to obtain output value S.

Do you make the necessary arrangements for the code to work in this order?

Thanks in advance !!

Answer 1

[Star Strider]

Use the Symbolic Math Toolbox:

syms S
P=10;
E=5;
V=0.33;
M=2;
K=1.5;
B=0.5;
H=0.3;
T=1;
Pfcn=((E*S)/(1-V^2)*M*K^2*B^2)*((H-S/2)*(H-S)*T+T^3);
Ssol = vpasolve(Pfcn == P)

producing:

Ssol =
 
                                         1.2272645680296059191773342534578
 - 0.16363228401480295958866712672892 - 1.5983944082554683248490550151884i
 - 0.16363228401480295958866712672892 + 1.5983944082554683248490550151884i

[Dilan Kutmaral]

Thanks!!!

[Star Strider]

As always, my pleasure!