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agrego ploteo en código de VM dinámico #19

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merged 3 commits into from
Aug 8, 2022
Merged

agrego ploteo en código de VM dinámico #19

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0256260
pasaje a julia de nl mises
Dec 9, 2021
2bc86e6
actualizo script de vmdyn en octave
Jan 10, 2022
c392374
quito archivo de julia
Aug 8, 2022
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22 changes: 19 additions & 3 deletions src/VonMisesNL_DifCent.m
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Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
%%% Dinamica No-Lineal: Cercha Von Mises (Barra de Green) %%%
clc, clear all
clc, clear all, close all

%%% Parametros Estructura
rho = 7850; % kg/m3 (acero)
Expand All @@ -12,7 +12,7 @@
E = 200000e6 %Pa (acero)
kc = 3*E*Ic/Lc^3; %N/m
mb = l0*Ac*rho; %kg
m = 1.4; %kg Pandeo incipiente en 1.4
m = 3; %kg Pandeo incipiente en 1.4
c = 2; %kg/s (amortiguamiento por friccion juntas y arrastre pesa)
g = 9.81; %m/s2

Expand Down Expand Up @@ -50,13 +50,14 @@

epsg(k) = (u(1,k)^2+2*Lz*u(2,k)-2*Lx*u(1,k)+u(2,k)^2)/2/l0^2;

while t<tf
while t(end) < tf
feff = ft(t(k)) -Fint(u(:,k)) +a2*M*u(:,k) - M2*u(:,k-1);
u(:,k+1) = Meff\feff;
acc(:,k) = a0*(u(:,k+1)-2*u(:,k)+u(:,k-1));
vel(:,k) = a1*(u(:,k+1)-u(:,k-1));
epsg(k+1) = (u(1,k+1)^2+2*Lz*u(2,k+1)-2*Lx*u(1,k+1)+u(2,k+1)^2)/2/l0^2;
k=k+1; t(k)=t(k-1)+dt;
t(end)
end

subplot(3,1,1)
Expand All @@ -71,3 +72,18 @@
plot(t(1:10:end),E*Ac*epsg(1:10:end))
xlabel('t [s]'); ylabel('Directa [N]')
axis([0 2 E*Ac*min(epsg)*1.1 E*Ac*max(epsg)*1.1]);

%system('rm out/*')
figure
grid on
for i=1:500:size(u,2)
fprintf('ploting time %12.3e \n',t(i) )
u(:,i)
plot( [u(1,i) Lx 2*Lx-u(1,i) ] , [ 0 Lz+u(2,i) 0],'r-o')
%plot( [u(1,i) Lx ] , [ 0 Lz+u(2,i)],'r-o')
title( [ 'time: ' sprintf('%12.3e', t(i)) ' s'] )
axis( [ min(u(1,:)) -min(u(1,:))+2*Lx min( [Lz+(min(u(2,:))) 0]) Lz+(max(u(2,:))) ] )
%axis( [ min(u(1,:)) -min(u(1,:))+2*Lx 0 Lz+(max(u(2,:))) ] )
print( [ 'out/vonmises_' sprintf('%05i',i) '.png'],'-dpng' )
%stop
end