Car Shredder Fdn
Car Shredder Fdn
(OP)
I am designing a pile foundation to support a car shredder mill. The manufacturer gave dynamic forces and frequencies on the drawings, so I have performed a time history/dynamic analysis in staad to get the foundation natural frequencies and vibration response.
The natural frequency of the foudation is 50% removed from the machine, so I am good there. But the vibration amplitudes are higher than I would expect. The nature of the mill is that it is constantly changing the dynamic load based on how big/dense/fast the scrap is coming in.
Has anyone designed one of these, and what guidelines did you use for permissable vibrations?
Thanks.
The natural frequency of the foudation is 50% removed from the machine, so I am good there. But the vibration amplitudes are higher than I would expect. The nature of the mill is that it is constantly changing the dynamic load based on how big/dense/fast the scrap is coming in.
Has anyone designed one of these, and what guidelines did you use for permissable vibrations?
Thanks.






RE: Car Shredder Fdn
Waht allowance have you made for damping from surrounding soil?
RE: Car Shredder Fdn
I am not yet sure that having the vertical natural frequency above and the horizontal below is good practice- it seems like in some direction between the vertical and horizontal the frequncy would match the machine.