1. 充.3
2. .........4
3. 充..5
4. .......7
5. .9
6. .15
7. 腅18
8. .....22
9. 1 .....23
10...........26
.
, IV , [1]. , , , , , .
, , . .. , , : ; ; ; .
, , , , . .
, , :
,
L , ;
- , ;
wi i , 2;
i .
, , .
(=1.7) (=2.5) . , w=(). w. wi, (1) . .1. , , , :
|
|
1
- | i( - ) | |||
28.0 | ||||
29.0 | 29.0 | |||
26.0 | 30.0 | -4 | -8 | |
20.0 | 30.0 | -10 | -30 | |
10.0 | 20.0 | -10 | -40 | |
222.0 | -78 | |||
S | 217.0 | -78.0 | ||
V=DL´ | 11.02×217.0 | 2391.3 | ||
xc = DL | 11,02×(-78)/217.0 | -3.96 |
, . :
- m= 1.7 3/;
- 2 3 4.6 ;
- .
: , 50% .
m, . .2 .3 50% .
.2 .3 - .
2
100% .
Pi, | xi, | Mi, | zi, | Mzi, | |
-8.97 | -12611.8 | 4.2 | 5905.2 | ||
2- | 576.5 | 8647.1 | 3.4 | 1960.0 | |
3- | 588.2 | -3.9 | -2294.1 | 3.1 | 1823.5 |
2570.7 | 2.13 | -6258.8 | 10.7 | 9688.7 |
.
:
= 2.1 ,
= 2.4 .
:
:
=+0,2=2.4+0.2=2.6 .
:
=+0,25=2.4+0,25=2.65
3
50%
Pi, | xi, | M i, | Zi, | Mzi, | |
-8.97 | -12611.8 | 4.2 | 5905.2 | ||
2- | 276.5 | 4147.5 | 1.8 | 497.7 | |
3- | 282.4 | -3.9 | -1101.4 | 1.9 | 536.6 |
1964.9 | -19.2 | -9565.7 | 7.9 | 6939.5 |
Mx Mz (3) (4).
:
=1.2 ;
=2.1 .
=+0,2=2.1+0,2=2.3,
=+0,25= 2.1+0.25=2.35 .
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