.
w d 1 [7, . 57]. w, .
Kd ; Kd = 675 ; Kd = 770 [6, . 331]; [7, . 57].
[6, . 332; 7, . 57]
, ;
Ka : Ka = 495, Ka = 430 [6, . 332; 7, . 57];
2 ( );
u ;
H β , , ψ bd (. 5.3):
ψ bd = b 2 / d 1 = 0,5 ψ ba (u 1)
ψ bd ;
ψ ba ; (. . 22).
, , ,
K = 430;
ψ ba = 0,4;
ψ bd = 0,5 [0,4(5 + 1)] = 1,2;
KH β = 1,12;
(. 5.4, . 55). w = 125 .
mn = (0,010,02) w = (0,010,02) 125 = (1,252,5) .
(. 5.5, . 55) m = 2 . 1,5 .
b 2 = ψ ba w = 0,4 125 = 50 ;
b 1 = b 2 + (27) = 50 + (27) = 5257 .
b 1 = 55 .
β = 718.
εβ = 1 [8, . 174, . 9.1], :
sin β = π mn εβ / b 2 = 3,14 2 1 / 50 = 0,1256;
β = 712'55'' βmin = arcsin(4 mn / b 2).
β , , β = 10.
[2, . 13]
z ∑ = (2 w cos β) / m = (2 125 cos 7,2154) / 2 = 124,01.
|
|
z ∑ = z 1 + z 2 = 124.
z1 z 2.
z 1 = z ∑ / (u +1) =124 / (5 +1) = 20,67;
z 1 = 21;
z 2 = z ∑ z 1 = 124 21 = 103.
u = z 2 / z 1 = 103/21 = 4,905.
∆ u = (u u) / u 100 % = ((5 4,905) / 5) 100 %) = 1,9 % ≤ 4 %.
, w = 125 , :
cos β = m (z 1 + z 2)/(2 w) = 2 (21 + 103) / (2 125) = 0,992;
β = 7,25220 = 715'8''.
, :
d 1 = m z 1 / cos β = 2 21 / 0,992 = 42,339 ;
d 2 = m z 2 / cos β = 2 103 / 0,992 = 207,661 ;
d 1= d 1 + 2 m = 42,339 + 2 2 = 46,339 ;
d 2 = d 2 + 2 m = 207,661 + 2 2 = 211,661 ;
df 1= d 1 2,5 m = 42,339 2 2,5 = 37,339 ;
df 2 = d 2 2,5 m = 207,661 2 2,5 = 202,661 .
:
w = (d 1 + d 2) / 2 = (42,339 + 207,661) / 2 = 125 .
, , (. 5.2):
:
Ft = 2 2 / d 2 = 2 331080 / 207,661 = 3188,66 ;
:
Fr = Ft tg α tw / cos β = 3188,66 tg 20 / 0,992 = 1169,94 ;
:
F = Ft tg β = 3188,66 tg 715'8'' = 405,77 .
. 5.2. ,