( ) .
, - ,
(XII.18)
; Qj j - , Qj > 0, , Qj < 0, ; rj j - , .
, (XII.18)
(XII.19)
tj , j - .
, , . , , Q . . , ; t - , ,
, , , . t - , ,
∆
(XII.20)
, (XII.9),
(XII.21)
107
S = 500 h = 30 m = 20% σ = 30%. 300 /2 (29,4 ) 200 /2 (19,6 ), , β = 3,0610-10 2/?
.
. , , ∆ =100 /2 (9,8 ):
108
4500 , h =15 , 50 /2, m =18%, βH = 2,0410-9 2/, σ = 20%, β = 4,5910-102/, β = 1,0210-10 2/.
: = 1,35106 3.
109
, , , SH = 1000, S = 10 000 , h = 10, m = 25%, σ =2%, ,
|
|
180 80 /2.
. , ,
, ∆ = 100 /2 ,
, ,
110
, (. . 74) B = 300 , h =15, k = 0,8 , t = 2 = 9,8 . = 12,74 , = 1,53109 2/ = 061210-10 2/, m = 20%, μ= 1,5 .
.
, .
. - ( ):
.
:
א
, ,
l{t) , t, ; l(t) p = const
111
, (. . 74), t = 0 Q = 500 3/. = 400 , h = 18 , k = 0,5 , β =2,0410-9 β = 0,5110-10 2/, m = 16%, μ = 3 , k =14,7 .
.
t =10 , , , .
.
|
|
(XII.22)
:
t = 0 p (x,0) = pk
(XII.23)
x=0
(XII.24)
(XII.22) , ,
, ,
..
(XII.25)
(XII.25) (XII.22), :
t = 0 w(x, 0) = 0 (XII.26)
= 0 w (0, t) = w1 = const. (XII.27)
(XII.25) (XII.26) (XII.27)
(XII.28)
, ,
t:
(XII.29)
(XII.30)
(XII.30) (XII.29),
, ,
,
, .15.
. 76.
. , l(t) ,
, (. . 15),
112
t ==15 , Q = 100 3/; = 250 ; h == 10 , k = 400 , = 0,306 10-10 2/, β = 4,5910-10 2/, μ = l,2 , m =l5%, = 11,76 (120 /2).
, . .
. 111
(XII.31)
(XII.32)
(XII.32) (XII.31),
(XII.33)
:
.
, {) t =15 . (XII.33) . 16 . 77 ( 1).
. .
(XII.34)
t =15
(XII.35)
(XII.35) . 17 , . 77 ( 2).
(XII.36)
,
(XII.37)
3, (XII.37), . 77.
, , .
113
, , , = 8,82 . pk= 11,76 . , 1 , 1 1 , k = 250 , h = 12 , - א = 1,5 2/, μ =l,3 . , r = 0,1 .
|
|
. , Rk , .
: Q = 5153/; Qcy = 424 3/; Q = 356 3/.
3 114
א , . Q = 100 3/ . k =150 /2, r = 0,1 . :
..1 2 3 4 5
t............................................15 1 12 1 5
.3,46 3,84 4,57 4,76 5,23
.
(. 78).
. 78, :
, , .
, b = 1,5 /2,
,
115
, Rk=10 , , . Q = 120 3/, μ = 2 , k = 600 , h = 10 , r = 0,1 , א = 2,5 2/ , pk = 14,7 (150 /2).
. , ,
, , . ,
, ,
,
116
, , ., Rk, Q = 80 3/, Q1 = 55 3/. Qi .
. t = 0 - .
.1 2 3 4 5 6
t ...5 15 3 1 3 10
3,71 3,62 3,44 3,27 3,18 3,1
..2,48 2,95 4,03 4,94 5,41 5,94
.
, Q, (Q Q1).
|
|
,
, ,
, ∆ lg t
∆ lg t i (. 79).
i
117
rC = 10 Q =80 3/. h = 7,5 , k = 400 , א = 2 2/, μ = 1,510-3 . T =10 . : 1) t1 =l t2 =5 ; 2) , 1% .
. ,
(XII.38)
, , . , .
, ,
(XII.39)
, ,
(XII.40)
(XII.39) . (XII.40),
(XII.41)
,
1%,
(XII.42)
(XII.41)
(XII.43)
(XII.42).
(XII.43), , (XII.42), .
t1 = 1
t2 = 5
(XII.41). ∆ . 18 . 80.