Submodeling

hello

I am working with a large assembly I want to perform Frequency response analysis on this large assembly

 

so can i use Submodeling approach for this to save my time and concentrate on a particular component in assembly?????

 

i googled the topic i found that submodelling is mostly related with Free body diagram so is it possible to capture the stiffness of other component? 

 

and use Submodeling for modal or Frequency response analysis????