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1
  2 , (7.43)
  
1  
  
 0 
called the growth rate fluctuation.

With respect  1, that is, the resonance coefficient  ,

0
and with it, and the amplitude of forced oscillations increases
indefinitely. In reality, the amplitude of the forced oscillations at
resonance does not increase indefinitely because of the resistance.
Usually take these forces is proportional to the speed of the
vibrational motion. Then the growth rate of fluctuations is
expressed
1
  , (7.44)
2
    2     2
1       2  




    0      0 
which indicated through  specific rate of resistance is the
resistance per unit volume weight at speed, which is equal to one.
Graphs of dependence of the value  of the share  
/
0
for several values of the specific resistance coefficient  are
shown in fig.7.13.

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