k matrix for multidegree of freedom

[stu11uk]

hey

does any one know what does the K matrix looks like for six degrees of freedom lumped mass system. I can compute the K matrix up to three degrees of freedom..I am a bit confused i dont know the matrix i got is right..can anyone help or direct me on how to compute the K matrix..

if you dont know what i am talking about.. i mean the K matrix which looks like this for two degree of freedom system

K = [k1+k2 -k2
-k2 k2]

 

[Qshake]

There are many texts out which have good chapters on multi-degree of freedom systems. Many have multi-story buildings as examples with some up to 5 or more stories. My suggestion is to look for these books.

Authors include:

Chopra
Penzien/Clough
Paz
Craig
Berg
Naziem


Regards,
Qshake

Eng-Tips Forums:Real Solutions for Real Problems Really Quick.

 

[jdgengineer]

Helpful to draw deflected shape for each degree of freedom. It will help you visualize it. All other degrees of freedom are locked except the one you put a unit displacement on. If you can do 3 degree of freedom, 6 degree is really no different...