. :
1=+f, (17.1)
, ; f .
, ,
=qu2, (17.2).
q 1 ; u , /.
f 9,8fqA, (17.3)
, ; f = 1+5s y-, .
1 , 2 :
1 = + +2, (17.4)
, , . . , . . .
- .
= (1 + 2)/2, (17.5)
= (1 - 2)/2 (17.6)
, , . :
v=L=Ltt, (17.7)
L Lt , ; v=ztn/60- , /; t- ; ; n- , /.
( )
NT/T=60Tzn/Lt. (17.8)
, . :
Z1tn1=z2tn2,
i=n1/n2=z2/z1,
n1,z1- ; n2,z2- , .
, , , , . , .
( *) N ( )
= N/w= 9.55 N/n= N/0/1n. (17.9)
= 2/d, (17.10)
d- .
,
D = t/sin /Z (17.11)
sin /z = /z,
D = tz/.
2 =nii. (17.12)
. . . . ... 0.96 0.98. n=0.97. = 1.15; = 1.05 .