How can i calculate the shock response spectrum from a time data in matlab. I have an acceleration signal. I have no idea
MATLAB: How is a Shock response spectrum estimated
shock response
Related Solutions
https://in.mathworks.com/help/matlab/ref/fft.html
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So, I managed yo get something right ! Had to rearrange the code a bit, rewrite the equations in a much simpler form (I over-complicated myself), got some help from our teacher and here it is:
m1=1;m2=1; %Particles' masses
radius1=0.1;radius2=0.1; %Particles' radius
k=10000; %Spring's stifness parameter
L0=rayon1+rayon2; %Spring's equilibrium's length
SystemInit=[0,0, %Initial position of the first particle
1,0, %Initial position of the second particle
1,0.1, %Initial speed of the first particle
0,0]; %Initial speed of the second particle
time=[0,10];[t,y]=ode45(@(t,y) odefonc(t,y,m1,m2,k,L0),time,SystemInit);plot(y(:,1),y(:,2),'or',y(:,3),y(:,4),'db')axis equalAnd here's the odefunction:
function u=odefonc(t,y,m1,m2,k,L0)u=zeros(size(y));u(1)=y(5); %Velocity of the first particle along the X axis
u(2)=y(6); %Velocity of the first particle along the Y axis
u(3)=y(7); %Velocity of the second particle along the X axis
u(4)=y(8); %Velocity of the second particle along the Y axis
d=sqrt((y(3)-y(1))^2+((y(4)-y(2))^2)); %Distance between the two particles
a1=(k/d*m1)*(L0-d);a2=(k/d*m2)*(L0-d);if d<L0 %i.e if there is contact
u(5)=a1*(y(1)-y(3)); %Acceleration of the first particle along the X axis
u(6)=a1*(y(2)-y(4)); %Acceleration of the first particle along the Y axis
u(7)=a2*(y(3)-y(1)); %Acceleration of the second particle along the X axis
u(8)=a2*(y(4)-y(2)); %Acceleration of the second particle along the Y axis
endendWhat I'm plotting is the trajectory of both particles.
Anyway, thanks to you all, you've helped a lot !
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