Hi All,

I am running a dynamic analysis of a simple model using Relief Load spectrum. The natural frequencies and mass participation facors I get from running a mass model and a cinsistant model (in Control Parameters window)are quite different to each other. Can someone explain this and advise which option gives better results.

Regards

Ranjan

Sorry, I forgot to look in the HELP menu before I wrote this query. It expalins that consistent model is better.
Thanks