h£150 . 14.7.
. 14.7. :
1- hx1; 2- hx2;
3-
r0, h0, rx 14.1. :
:
L £ h: hc = h0; rcx = rx; rc = r0;
h < L £ 2 h:
(14.12)
2h < L £ 4 h
hc = h0-(0,14+510-4h)(L-h)
; rc = r0 ; rcx = r0(hc-hx)/hc.
:
L £ h: hc = h0; rcx = rx; rc = r0; (14.13)
h < L £ 6 h:
hc L ( rcx = 0)
h = . (14.14)
14.4.
:
1. (. . 14.1 14.2).
2. ( ):
) ;
) (, , , .);
) .
II , (. . 14.1).
, L S , . h 10, 15 20 .3 (), 5 . , - 20000 18 (h = + 5 = 12,94 + 5 = 17,94 ). - 50000 - 24,4 .
1. () L = 10 , S = 6 , hx = 4,5 , , . . 14.8.
: . -87 1, II (. 14.1).
:
N = [(S+6×h)(L+6×hx)7,7×hx]n×106 = [(6+6×4,5)(10+6×4,5)7,7×4,52]6×106 = 0,00639<1, , .
h = ,
rx - h = 4,5 ,
.
, 10,6 .
14.8.