Craig-Bampton or Craig-Chang type ?

Altair Forum User

I am new with component mode synthesis and I am not sure which type to use ? Craig-Bampton (CB) or Craig-Chang (CC) ?

I know that CB is a method that considers fixed interface component modes and CC, free interface component modes. 

Do you have example where I should use one or the other ?

Thank you

Benjamin

Altair Forum User

Hi Benjamin,

 

There is no tutorial available. But, If the fixed condition more represents the real condition then the Craig-Bampton should be used

 if the free condition more represents the interface condition then the Craig-Chang method should be used.

Altair Forum User

Where can I find the definition of a fixed condition and free condition ?

Altair Forum User

For your reference,

Please refer this PAPER.

 

1. This paper gives you the comparison between different dynamic sub structuring models with respect to it's experimental prediction.

https://orbi.ulg.ac.be/bitstream/2268/192786/1/273_roe.pdf

 

2. This paper gives idea about the accuracy required to get good results for stresses.

http://web.mit.edu/kjb/www/Principal_Publications/Component_mode_synthesis_with_subspace_iterations_for_controlled_accuracy_of_frequency_and_mode_shape_solutions.pdf

 

Have a Nice Day...