Error code: "Index in position 2 exceeds array bounds (must not exceed 1)." when running code for two-element spring system

9 次查看（过去 30 天）
S.
S. 2024-3-8
评论： VBBV 2024-3-8
I am using Matlab to code a two-element spring in FEA, based on Peter I. Kattan book's : MATLAB Guide to Finite Elements: An Interactive Approach. In it, there is an example numbered as Example 2.1, which includes codes as follows
Here is the example question:
And here is the stiffness matrix calculations:
Here is global stiffness matrix calculation
However, when I run K=SpringAssemble(K,k1,1,2), I get this error message
Can anyone help me out on this one? Thank you.

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回答（1 个）

VBBV
VBBV 2024-3-8
K(i,i) = K(i,i) + y(1,1);
K(i,j) = K(i,j) + y(1,2);
  2 个评论
VBBV
VBBV 2024-3-8
编辑：VBBV 2024-3-8
k is scalar assigned to variable y defined inn the function
function y = SpringElementStiffness(k)
y = [k -k;-k k]
end
but you are trying to access the nonexistent elements by using
k(1,2)
You need to use y in place of k

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