I submit a program to calculate natural frequencies and eigenvectors of mechanical structures for vibration analysis. The purpose of knowing these frequencies is to check if there is any risk of resonance with excitation frequencies from external forces.
I enclosed a short user’s guide that explains the program and some very basic theory of mechanical dynamics. I will send it in a second thread because of it's size.
If there is any interest, the user’s guide could be translated to French and German.
Any positive critic, improvement suggestion and bug report is of course welcome.
The program is relatively slow on the device, but with version 6.00 of Basic4ppc hopefully it could speed up. Probably from the code point of view I have not used all the potential of Basic4ppc, I don't know yet all the possibilities.
Klaus
Switzerland
Update 2008.01.21
The program has been updated for the new compiler, thanks to agraham who made run the Eigenvalue routine once again.
Speed increase for the calculation 8 times !
Update 2009.09.25
Version 2.2
Help file:
www.basic4ppc.com/files/freqe.chm
Klaus Switzerland