I'm looking to implement eigenvalue and eigenfrequency analyses to my own FE code (1D analysis of laterally loaded pile), and was wondering if anyone knew of:
1) Some good references which can aid in implementing the above analyses in my code (I have a few references, but maybe there are some better ones?);
2) Some relatively simple examples which I can benchmark my analysis results to (either from a separate analysis software or other source).
Thanks in advance for any help.