7
:
: 1. -
2.
2.1.
2.2.
2.3.
1. - . , , (. 40).
I. , , , .. , , (, ). .
I I, Rbt, .. . , .
( 1020 ), .
, , .
II. . . , .
, , . , .. .
, .
II , - ( ), , - .
III ( ). , . , .
|
|
.
1 - . , ( ). , - , . , , .. . . ( 10%).
( 4%) , .. . 1, .. .
C 2 - . . . , .. , .
1
x = x / h 0 £ xR, (7.1)
2
x = x / h 0 > xR, (7.2)
- ; h 0 - ;
xR = xR / h 0 - , ( ).
( , ). , , .
esc = eb , u @ (2,02,5)×10-3,
ss = ssc , u @ escEs = (2,02,5)10-3 ´2×105 = 400500 . (7.3)
, 600 .
:
Ia - ;
II - , ;
III - , ( ); Rb.
2.1. . 1938 . , .
II :
- ( );
|
|
- , .. ;
- ;
- - -
a = Es / Eb
es = eb ss / Es = sb / Eb,
ss = sbEs / Eb = asb.
, a - , , a - .
, (Ared, Ired ..). sb, ss ss' .
[ sb ] = 0,45 R [ ss ] = 0,5 sy.
, , , .. , , . , . , , , .