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No empirical fluid force coefficients are required.
In the paper, an expression of the fluid force responsible for the added stiffness is proposed.
However, the fluid force acting on the fuel rod is mostly due to the pressure.
The fluid structure interaction effects are calculated in terms of the generalized added mass coefficients, generalized Coriolis fluid force coefficients and generalized centrifugal fluid force coefficients.
The fluid structure interaction forces are calculated in terms of the generalized added mass coefficients, generalized Coriolis fluid force coefficients and generalized centrifugal fluid force coefficients.
The rotational character of the bearing fluid force is taken into account.
As a preliminary study, the harmonic force is used to model the fluid force.
Further analysis reveals that the fluid force components are dependent on structural damping and mass ratio.
It is found that acoustic resonance did not modify the static fluid force.
The fluid force varies with the beam vibration at a phase difference of more than 180°.
Thus the fluid force suppresses the beam vibration at most of the time.
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