Diff equation for finite element method
8 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
Hi all,
please could someone help me with this problem. I have to solve this diff equation y''= -6x+2 , x belongs to interval (0,2) and y(0)=y(2)=0
I tried to use dsolve
if true
x={0,2}
eqn2='D2y=-6(x)+2'
inits2='y(0)=0,y(2)=0'
y=dsolve(eqn2,inits2,'x')
end
but this does't work. And also tried to use ode45 function but i think this equation can't be solved by ode45 function. Could someone give me a hint how to do it, or better, example of code how to achieve solution. Many thanks
Sam
0 Kommentare
Antworten (2)
Mischa Kim
am 20 Apr. 2014
Bearbeitet: Mischa Kim
am 20 Apr. 2014
Sam, use a bvp solver
function pdetest()
solinit = bvpinit(linspace(0,2,5),[0 0]);
sol = bvp4c(@mypde,@mybc,solinit);
x = linspace(0,2);
y = deval(sol,x);
plot(x,y(1,:));
end
function dydx = mypde(x,y)
dydx = [y(2); -6*x + 2];
end
function res = mybc(ya,yb)
res = [ya(1); yb(1)];
end
0 Kommentare
Siehe auch
Kategorien
Mehr zu Ordinary Differential Equations finden Sie in Help Center und File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!