Modal analysis of cylindrical shell

- July 19, 2020 at 7:40 pm
  
  Chamid
  Subscriber
  
  Hello,
  
  I am trying to simulate cylindrical shell, and in comparison with analytical calculations based on Kirchoff-Love theory relative error is about 4% in the first 8 modes.
  
  I have checked that the order of the modes is ok (first natural frequency is for n=4 and m=1 and so on). I have tried elements SHELL181 and SHELL281 and the results are nearly identical.
  I would be very grateful if one can suggest me what I can do to get more consistent results?
  
  I am attaching wbpz file and my analytical calculations.