Design and Stress Analysis of Extraterrestrial ... - The Black Vault

To solve the problem of the vibration of a rotor on hydrostatic
bearings we need ýhe analytical dependence of forces on displacements
and rates of displacements of the rotor pivot relative to the
bearing.
In hydraulic bearings the dependences of dimensionless forces
on relative parameter, e, V 0 and v 0 are continuous functions and
can be approximated sufficiently well by power polynomials,
Thus, function F (e) can be, for a certain range of relative
rO
velocity VO, approximated by an analytical dependence of the form
Pro=azje(I +Pj8 2 +Vie4),
where -a, I, -l-are coefficients which depend on the geometric
dimenslons of the bearing and the relative rotational velocity VO.
Fig. 3.87. Dependence of '8 2)E=g8=
dimensionless force Fc on
4) 6=0,8;VOg5
pivot velocity v 0 .
I7.4)E=L8;V=zo
0,5-
/
4-
*
-• • , _.
& o
O' lo0.10o
For practical analyses Fro(c) can be expressed by a simpler
linear dependence
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