.
; .
. : ) 1 = 10 ; ) = δ = 8. .
[2. 3, .392]
d | D | B | , | ||
, | C | Co | |||
14,5 | 6,95 | ||||
25,5 |
. . y = 12
:
l1 = 55
l2 = 55
l1 = l2 = 55
:
Ft = 1409 H; Fr = 583
/>/>
RAX = RBX = Ft / 2 = 1409 / 2 = 704,5
RAY = RBY = F2 / 2 = 513 / 2 = 256,5
= 749,7
My
My = RAX ∙ l1 = 749,7 ∙ 0,055 = 41,2
Mx
Mx = RAY ∙ l1 = 256,5 ∙ 0,055 = 14,1
Mk
Mk = 1 = 54,6
= v ∙ RA ∙ kσ ∙ k
:
RA = 584
:
Fa = 0
V = 1,0
[2. . 9.18, .212]
Kσ = 1,0 [2. . 9.19, .214]
= 1,05 [2. . 9.20, .214]
P = 786
, .
[2, 9.1, .211]
,
10000 . .
[2. C.307]
:
RCX = RDX = RAX = 704,5
RCY = RDY = RAY = 256,5
:
749,7
Mx
Mx2 = RAY ∙ l1 = 256,5 ∙ 0,055 = 14,1
My
My2 = RAX ∙ l1 = 749,7 ∙ 0,055 = 41,2
Mk
Mk = 2 = 160
:
= 786
:
.
,
Lh = 75 ∙ 103 Lh = 36 ∙ 103
|
|
.
45 . 23360 78
[2, . 8.9, .169]
:
[σ] = 100 ÷ 120
:
¾ :
d = 22 ; b×h× l = 6×6×40 ; t1 = 3,5;
[2. . 8.9, .169]
¾ :
d = 30 ; b×h× l = 8×7×35; t1 = 4;
[2. . 8.9, .169]
:
¾ :
d = 40 ; b×h× l = 12×8× 40; t1 = 5 ;
¾ :
d = 32 ; b×h× l = 10×8× 40; t1 = 5 ;
,
, , .
S ≥ [S]. .
:
, 45, ,
, σ = 780
[2. . 3.3, .34]
:
σ-1 = 0,43∙ σb = 0,43 ∙ 780 = 335
:
τ-1 = 0,58 ∙ σ-1 = 0,58 ∙ 335 = 193
.
:
- ;
[2. . 8.5, .165]
- ;
[2. . 8.8, .166]
- , ;
- ,
:
:
:
Kτ = 1,7 [2. . 8.5, . 165]
ετ = 0,77 [2. . 8.8, . 166]
ψτ = 0,1 [2, . 166]
:
:
45
σ = 570 [2. . 3.3, . 34]
σ-1 = 0,43 ∙ 570 = 245
τ-1 = 0,58 ∙ 246 = 142
. 45. .
:
σ = 1,6 ; σ = 0,85;
τ = 1,5 ; τ = 0,73; ψτ = 0,1
[2. . 8.5, 8.8, . 166]
|
|
:
d = 40 ; b = 12 ; t1 = 5
:
σm = 0