3.3. .
, . , ( ).
, ;
, ;
l2 = H hM + l1 = 1300 320 + 210 = 1190 ()
L2 = l2 + l = 1190 + 410 = 1600 ()
.
3.3.1. .
:
n = ≥ [n], [1, .10, .49]
n σ n τ
;
[n] = 1,31,5 .
[n] = 1,5
, , , :
Nτ ≥ [n].
:
nτ = τ-1 / (Kτ τa / Kd + ψτ τm), [1, .50]
τ-1
, ;
τa τm
, ;
Kτ ;
Kd
;
ψτ .
:
τ-1 = 0,25 σ [1, .50]
σ , ;
- . 123.
[σ] = [σ]1 +
[σ]2 = 525 (); [σ]1 = 530 ();
t2 = 200 C; t1 = 100 C; t=114 C;
[σ] = = 529.3 ; [2, .2.7]
τ-1 = 0,25 529.3 = 132.2 ()
:
τ = τm = 0,5τ = / 2W , [1, .50]
, ;
= 0.133 103 ( );
W
, 3;
τ , ;
W :
W = , [1, .50]
d1 , ;
d1 = 0,040 ()
b t , ;
b = 0,014 (); t = 0,0055 (); [4, .426]
|
|
W = = 3,13 10-4 ();
τ = τm = 0.133 103 / 23,13 10-4 = 0.22 ();
.. σ < 700 , τ = 1,4 [1, .51].
Kd = Kd1 +
Kd2 = 0,7; Kd1 = 0,73;
d2 = 50 (); d1 = 40 (); d = 40 ();
Kd = = 0.73; [1, .6, .51]
.. σ < 750 (), ψτ = 0.[1, .7, .52]
nτ = 132.2 / (1,4 0.22 / 0,73) = 313.33
313.33 >1,5;