- #1

amodiitm

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I am a final year Engineering student of IIT Madras, India. I am doing a project(finite element analysis of a structure) which requires the solution of a system of second order differential equations. equation looks like below:

[M][U"]+K

__=[F(t)]__

M : Mass Matrix of size 202x202

K: Stiffness matrix of size 202x202

F(t): time dependent force matrix of size 202x1

M , K and F(t) matrices are known

U: displacement matrix for nodes , size 202x1

U'': double derivative of displacement matrix, size 202x1

Initial conditions :

M : Mass Matrix of size 202x202

K: Stiffness matrix of size 202x202

F(t): time dependent force matrix of size 202x1

M , K and F(t) matrices are known

U: displacement matrix for nodes , size 202x1

U'': double derivative of displacement matrix, size 202x1

Initial conditions :

__=0 at t=0__

[U'']=0 at t=0

to find :

[U'']=0 at t=0

to find :

__at t__

this is the displacement matrix for the nodes of the system of elements

I will be extremely happy if someone could come out with a MATLAB code to solve this problem, this will be a great help for me as I am struggling with this from past few days and not able to make any progress in the project. Thanks a lot.. eagerly waiting for reply..

Amodthis is the displacement matrix for the nodes of the system of elements

I will be extremely happy if someone could come out with a MATLAB code to solve this problem, this will be a great help for me as I am struggling with this from past few days and not able to make any progress in the project. Thanks a lot.. eagerly waiting for reply..

Amod