How can I calculate Global stiffness matrix?
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I have two basic matrix and I want to sum them in C matrix like below picture. I added A matrix but I couldn't add B matrix in that way. What can ı do?
C = zeros (6,6)
A = [ 1 2 3 4 ;
4 5 6 7 ;
7 8 9 10 ;
10 11 12 13 ]
B = [ 5 7 8 4 ;
4 5 6 7 ;
7 8 9 10 ;
10 11 12 13 ]
for x = 1:1:6
C(x:2*x+2,x:2*x+2)=C(x:2*x+2,x:2*x+2)+A(x:2*x+2,x:2*x+2) %+B ?
end
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Accepted Answer
Cameron
on 13 Jan 2023
I don't remember everything from my FEA classes, but I think this is what you're looking for
C = zeros(6,6);
A = [ 1 2 3 4 ;
4 5 6 7 ;
7 8 9 10 ;
10 11 12 13 ];
B = [ 5 7 8 4 ;
4 5 6 7 ;
7 8 9 10 ;
10 11 12 13 ];
C(1:4,1:4) = A;
C(3:6,3:6) = C(3:6,3:6) + B;
disp(C)
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