Hi everyone, I think for you it is a piece of cake but I have to ask you something. I would like to calculate matrix K-Lambda M and determine egenvectors W. I tried but my checks are not satisfied. The values are diagonal but they have to be around zero exept 11,22,33. I need the help what kind of functions should I use?
Enclosed is a Mathcad 15 file I have found useful for vibrating beams.
Ask nicely and it probably can be converted to Prime with a bit of work.
The function you are looking for is Gamma=genvals(Kg,Mg) where Kg is the global stiffness matrix and Mg is the global mass matrix. See the file where this is done.
The file assembles the Kg and Mg
Attached is a document I developed a while ago, a spring/mass problem--same math. Maybe it'll help.