Rigid or Flexible Foundation???? Basic knowlege.
Rigid or Flexible Foundation???? Basic knowlege.
(OP)
Some one , can define the diference between a rigid or flexible foundation acording to table ISO 10816-3 for evaluate severity of vibration.
This selection have relationship with natural frecuency of the rotor?
Thanks,
A.Monroy
This selection have relationship with natural frecuency of the rotor?
Thanks,
A.Monroy





RE: Rigid or Flexible Foundation???? Basic knowlege.
a "rigid" foundation has 3D stiffness sufficient that all rigid-body modes have resonant frequencies well above rotating frequency.
a "flexible" foundation would have RBMRFs well below rotating frequency.
Discussions about the proper meaning of "well below/well above" RF are likely to include numbers ranging from 10%, thru 40% and beyond. I would not participate in those discussions.