D, n t.
:
-
D Dk = , (6.8)
D Dk = D Lk × n, (6.9)
;
D Lk ;
.
-
D Dt = D × a(t t ), (6.10)
a - ( a = 0.0000125);
t , t ( t = +20).
-
, (6.11)
n .
Dn = D + D Dk +D Dt. (6.12)
(. 6.7)
d = D + D Dk +D Dt +D D n. (6.13)
d = D n × cosn. (6.14)
. 6.7.
, n £ 2, (t t ) £ 8.
³ . .
:
) ;
) .
. 6.8.
. (6.16)
:
1) b b;
2) b ( ) b.
.
. (, .) (. 6.9).
(.6.91) D
D = D 1 + f + d, (6.17)
f ᒺ ;
d ZZ ᒺ.
f d ,
= f + d. (6.18)
D 1 (6.16)
. (6.19)
b ( ),
. (6.20)
D = K× l + C. (6.21)
. 6.9.
K = 100 1 . ³ 0,1 , 0,1 .
|
|
³ 1/200 1/500.