I have one cantilever beam . I am trying to validate me analytical frequency result with ABAQUS.I am getting error while matching both results. Here is my beam dimensions . What could be the reason for not matching . This is happening with me in all structure problems. Did I doing wrong modelling . Please help me out. 
ABAQUS RESULT:

First Frequency - 13.07
Second Frequency - 133.70

ANALYTICAL RESULTS: