8.39 . . 23 .
: (1/9) L < < (1/6)L;
18-100 .
23 -
8.40 30 - 60 . . 7.30-7.46.
8.41 . ( 24).
nc = Nc / Tk c.pcosa, (87)
Nc - ;
- (. 7.38);
a - , 30 - 50;
k c.p - .
k c.p = 0,75, 30 % k c.p = 0,85.
8.42 g
s,g = V cos b /(bl c) + Nc tga / (ncbs 1 kc. p) £ R ,g, (88)
V - ;
b - ;
b - ;
s 1 - ;
R ,g - g , (2);
g - .
, , .
s 1
s 1 = T /(b (s,g - R ,g), (89)
- (. 7.38).
8.43 . . .
24 -
8.44 , .
8.45 . .
8.46 :
) ; , , ;
) .