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frequency analysis solid or shell?

Question asked by Bennie Buys on Sep 18, 2008
Latest reply on Sep 18, 2008 by Vince Adams
I currently performing frequency analyses on oil storgae tanks. I did a comparison between a solid model and a shell model. The solid seemed to be more stiff and the natural frequencies do not correlate to the shell's frequencies and mode shapes. Can you maybe explain the reason for the difference and which model will be the best to use.