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

I
I k i =
Ib the projections of displacement r and forward pivot vel.ocity
v onto the axes of a recta..gular udre system of coordinates designated
x, , ,•d
y ten heprojections of forces PI F2 and. 3°tZi
the same axes, with allowance for the directions of the forces, are
F 1 ., - kzx F 2 •=-- k~ y; Fa.= -- '~1 }J
Vibrations of a symmetric rotor. i o
Y|
Let us study a rotor as a weightless shaft with ant unbalancsed
disk in the center of the span. A diagram of such a rotor and the
AA
system of coordinates used are shown in . .i. 3.88.
a
I
centrgo the8 m igasso the dis (cm);r:• roto
Fig.e 3.88.e Diagra of dsycm);L ah
rot 0 re inthled pr ons f
oare intaled poeton so
th e d ipcmntr ofuc the piotlo cente 398 reigatives to tshe bernc ente or
dislcmntroduc Whe
the fiollocing d e e lgative 0o isthe baigcenter of
the) beyarin;01i the prjceinte of the rotorpivomet; ofi the geometric
center of the disk; 0eatv is the center of ms fthe disk;ing m); is
cetro y h aso x0, h ik(cm); are the tedslcmnso projections of h emti
center of the disk relative to the center of,. the bearin~g (cm);
398