, .
. , , , (. . 5.4). , . , r 2 , r 2 I 2 I I :
(7.35)
I ; I ;
r ; r , (. . 5.4).
I I 2. ,
, (7.36)
(7.36)
(7.37)
(7.38)
(7.39)
I , , ; D . , (. . 5.6),
(7.40)
q c , ;
k r ; c k r = 1;
q , 2;
, -, (. . 7.5).
7.5
, ∙, , | ||||
. ( ) . ∙ 75 ∙ 115.
r 2 . , (7.20) m 2 = Z 2 , w 2=l/2, k o2 = 1 :
(7.41)
(3.17)
|
|
b t Z2. g = p2 p / Z l. 2 = 2 - g k =1.
(7.42)
, , ..
l1 . 7.4.
l1 (7.47).
l1
(7.43)
x .
(7.44)
(7.45)
t Z1 t Z2 ;
DZ . 7.5, , k b (7.24) (7.27);
b = b CK/ t z2 , .
b = 0; k ' . 7.5, t Z2/ t Z1 b ( , b = 0).
(7.46)
(7.21) m 2 = Z 2 q 2 = 1/(2) l.
. 7.6 (. 7.6).
7.6
7.6, | |
7.6, | |
7.6, | |
7.6, | |
7.6, |
k = 1.
(. 7.6, -) . 7.5 . 7.6, h / b 0,3+1,12×106 h / I 2; . 7.6, h / b + 1,12·106 × h / I 2, h , ; I 2 , .
. 7.6.
: - ; ,
.
, (. . 5.6, ),
(7.47)
(..5.6, ), , , , , ,
(7.48)
D . (7.40);
|
|
D = 2sinp r / Z 2 ;
h b (. . 5.6);
l ¢d (7.23).
(7.49)
(7.50)
ΔZ . 7.5, .
(7.50), , , Z 2/ p ³10, x=1.
, ,
(7.51)
b , . b = 1; km , ( 6.27).
x' 2 = x 2 γ 12, (7.52)
γ12 (7.41).
r m (. . 7.1 ,) . , r m , , . ,
r m= /(mI 20 a), I 0 a.
m m = E 1/ I m.
r m m r 12 12 (. . 7.1, ),
m ³ m, 12xm, r 12£ x 12. r 12 , .
r 12 x 12 :
(7.53)
. (7.54)
. , .
, , :
(7.55)
. , x 1 = 0,08¸0,14 '2 = 0,1¸0,16.
, , 3040 , 1*. 12* = 2 ¸4.
: r 1* r ¢2* 0,02¸0,03; . r 12* 0,050,2.