FEA of hydraulic bearing
FEA of hydraulic bearing
(OP)
Hello,
I would like to build an FE model to investigate the dynamics of a long shaft which is making axial alternating movement, and bending mostly due to its own weight. The shaft is supported by hydraulic bearings with pressure control. How shall I take these bearings into consideration in the model? Anybody has experience on this?
Is a hydraulic bearing in this case behaves like a spring or more like a damper? I would appreciate your input.
Thanks in advance
GSC
I would like to build an FE model to investigate the dynamics of a long shaft which is making axial alternating movement, and bending mostly due to its own weight. The shaft is supported by hydraulic bearings with pressure control. How shall I take these bearings into consideration in the model? Anybody has experience on this?
Is a hydraulic bearing in this case behaves like a spring or more like a damper? I would appreciate your input.
Thanks in advance
GSC





RE: FEA of hydraulic bearing
-- drej --
RE: FEA of hydraulic bearing
Can you please explain to me what do you mean with considering the type of connection when applying the damping? Do you refer here to the bearing type in the real world or to the various numerical models available in the FE?
GSC
RE: FEA of hydraulic bearing
For example, in some structural codes (ASCE 4-98 for example), the damping levels for a structure are dependent on whether the connections are bolted, welded or correspond to some type of pinned or other condition &c. For each of these conditions the damping level applied may be different depending on the code used as well. Hence, your bearing may resemble either a "pinned" or other type of connection, which will lead you to an appropriate level of damping for your shaft. Ideally, of course, you would need to carry out modal testing to obtain a more exact value of damping for your system.
Cheers,
-- drej --