Contacting structure in frequency response analysis
Contacting structure in frequency response analysis
(OP)
Hi,
I used RBE2s to connect two bolted structures together and run frequency response analysis (shell-solid). Ofcourse, the regions where there is no RBE2, structures may penetrate each other in modal analysis as well as in frequency response. My collegue suggest that I should use glued contact (so that shell is rigidly connected to solid in all contact area) will give more accurate results in freq response. What is the best method to model bolted structures for frequency response analysis.
I used RBE2s to connect two bolted structures together and run frequency response analysis (shell-solid). Ofcourse, the regions where there is no RBE2, structures may penetrate each other in modal analysis as well as in frequency response. My collegue suggest that I should use glued contact (so that shell is rigidly connected to solid in all contact area) will give more accurate results in freq response. What is the best method to model bolted structures for frequency response analysis.





RE: Contacting structure in frequency response analysis
RE: Contacting structure in frequency response analysis
RE: Contacting structure in frequency response analysis
Contact conditions have no place in a linear modal analysis. In the real world we call them rattles and eliminate them before testing.
Cheers
Greg Locock
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.