.1.
:
D = 0,219 h = 0,006 r =12 × = 1 . , , R = 100 ×2, , . 1, R 0 = 5×104 ×2. t = 30 . (1):
,
.
0,5 ×2.
R | 18,0 | 20,0 |
R | 19,89 | 20,03 |
R =20,0 ×2.
2 R < R :2´20,0 < 100, .
(3) (2) :
;
.
, , , .
.2.
1 (. E.1).
273 : 4 ( ), s = 332 , s = 384 , s = 435 , s = 480 , h 0 = 9 , 0,005 , 10 , t = 46 .
y (4) (+10 %) : y y1 = y + 0,1y : s/s = 0,9; s/s = s/s = 0,8 t = t = 46 (.E.1).
y1, s/s = 0,9, t = 63 . t = t s/s = s/s, Z . Z y, y , : t = t - t = 63 46 = 17 .
t,
..1
2 (..2).
2- : s = 309 , s = 384 , s = 435 , s = 463 .
1.
Z y ( y1), , t - t , y1 s/s = s/s. t = t - t .
|
|
1 : t = 76 , t = 55 , : t = t - t = 76 - 55 = 21 .
t,
..2
.3.
1 (..3).
273 : 4 ( ), = 78,4 /2, = 39 /2, h 0 = 9 , 0,005 , 10 , t = 46 .
(7) (-10 %) : 1 = - 0,1 : = 30 /2, = = 38 /2 t = t = 46 (..2).
1 = 30 /2, t = 61 . t = t = , Z . Z , , : t = t - t = 61 46 = 15 .
t,
..3
2 (..4).
2- : = 78,4 /2, = 38 /2. 1.
Z ( 1), , t - t , 1 = . t =t -t .
1 : t = 61 , t = 47 , : t = t - t = 61 - 47 = 14 .
t,
..4
.4.
219 : 3 ( ), s = 216 , s = 362 , h 0 = 6 , = 1,2 , t = 30 , , () , () h = 3,84 .
(14) (13) :
s0 =1,2´(0,219 - 2´0,006)/(2´0,006) = 20,7 ;
s = 1,2´(0,219 - 2´0,006)/(2´0,00384) = 32,34 .
(15)
V = 2,16/30 = 0,072 /.
(12)
t 0 = (6/0,072)´(1 - 20,7/162) = 72,7 .
(11)
t = 72,2 (-7/(8,31´293)´0,5´162´(32,34/162)0,5) - 30 = 65,9 - 30 = 35,9 .
.5.
()
219 : 3 ( ), s = 216 , s = 362 , h 0 = 6 , = 1,2 , t = 30 , , () , h = 3,84 ( ) di = 4 .
|
|
smax = 0,75s = 162 .
(19)
h = 6 - 4´(0,19´1,2/162)0,5 = 5,8 .
V = 0,072 /. V =0,13, V 1 = 0,103.
(17)
t = (5,8-2,16)/0,103 = 35,3 .