(, , ) , , .
. 29.1. 150
, , . : 99,5 % ; 95 % . , , .
h ≤ 150 (. 29.1) , h 0 < h, r. :
h 0 = 0,85 h; r0 = (1,1 - 0,002 h) h; r = (1,1 - 0,002 h)(h - hx /0,85),
h 0 = 0,92 h; r0 = 1,5 h; r = 1,5(h - hx /0,92).
h = (r+ 1,63 hx)/1,5.
150 L 29.2. L < 5. h 0, r0 r , , .
:
L ≤ h
hc = h 0 = 0,85 h; r = r0 = (1,1 - 0,002 h) h; r = r =
= (1,1 - 0,002 h)(h - hx /0,85);
< L ≤ 3 h
h = h 0 - (0,17 + 310-4 h)(L - h); r = r0; r = r0(h - h )/ h .
:
L ≤ 1.5 h
h = h 0; rcx = r; r = r0;
1,5 h < L< 5h
h = h 0 - 0,14(L - 1,5 h); rc = r0; rcx = r0(h c - hx / h c)-
c, L rcx = 0
h = (h +0,14 h)/1,13.
L > 5h, (h 0 = 0), .
h ≤ 150 L 29.3. , , . .
h ≤ 150 :
h 0 = 0,85/ h; r0 = (1,35 - 0,0025 h) h;
r = (1,35 - 0,0025 h)(h - hx 0,85);
h 0 = 0,92 h; r0 = 1,7; r = 1,7(h - hx /0,92).
. 29.2. 150 :
1 ; 2
. 29.3. 150:
1 ; 2 h
|
|
hx r
h = (rx+ l,85 hx)/l,7.
h . 35...50 2 2 L< 120 3 120≤L≤ 150. h . , L < 120 h = h + 1 , L = 120...150 h = h + 3 .