Solve an equation while we have an if statement that makes the coefficient depends on the variable
5 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
I want to solve this
M=166700; %kg%;
g=9.81; %m/s2%;
ro=2500; %kg/m3%;
H=6; %m%;
sigmac=20*(10^6); %Pa%
syms d;
if(d<0.8)
F2=3*(10^6)*(d^2)-30644;
M1=5*(10^7)*(d^2)-552844;
else
F2=103867*(d^2)+(10^6);
M1=2*(10^6)*d^2+2*(10^7);
end
F1=17759*(d^2)+1801.8;
m=sigmac-(M*g/(d^2))-2*ro*H*g+(6*H*F1/(2*(d^3)))+(6*H*F2/(d^3))+(M1*6/(d^3));
fsolve(m,d)
I am not getting an answer because the if test cannot be done without a value for d. Value that I aim to find by this code
1 commentaire
Réponses (1)
Walter Roberson
le 28 Mai 2022
typically the best way to solve these situations is to run both branches separately, vpasolve() each of the branches, test each result to see if it is within the constraints for the branch. There might be several answers.
0 commentaires
Voir également
Catégories
En savoir plus sur Statics and Dynamics dans Help Center et File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!