- 1
: . .
1
: - .
_____
2 :
ΣFix=0;____________________________________________________________
__________________________________________________________________
__________________________________________________________________
ΣFiy=0; ___________________________________________________________
__________________________________________________________________
__________________________________________________________________
__________________________________________________________________
- :
1 :
1.3-
2 :
__________________________________________________________________
__________________________________________________________________
__________________________________________________________________
__________________________________________________________________
: R 1 =__________; R 2 =___________.
- 2
: . .
2.1
: . .
_____
:
1 , .
2 :
Σ(Fi)=0; ______________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
Σ(Fi)=0; ______________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
3 :
:
ΣFiy=0; ____________________________________________________________
________________________________________________________________
|
|
|
0=0
.
: R =__________; R =___________.
- 2
: . .
2.2
: . .
_____
:
1 , .
2 :
ΣFiy=0; _________________________________________________________
________________________________________________________________
________________________________________________________________
_______________________________________________________________
________________________________________________________________
Σ(Fi)=0; ______________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
3 :
:
Σ(Fi)=0; _________________________________________________________
__________________________________________________________________
__________________________________________________________________
0=0
.
: RX =__________; RY =___________; MR = _____________∙
- 3
:
: , .
_____
:
1 :
____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ :____________________________________________________
2 , , 8509-86,
3 8510-86, 8239-89, 8240-89 ( , - ):
3.2-
:
3.1- :
| , 2 | i; | i; | z i; | ||
4. :
____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
|
|
|
____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
: =________ ; =_______ _. (_____;_____)
- 4
: . ().
4.1
: :
) Nz σ;
) () , =2·105 ;
) n, __________________ σ _____ .
_____
:
1 Nz:
__________________________________________________________________
__________________________________________________________________
__________________________________________________________________
__________________________________________________________________
2 σ :
__________________________________________________________________
__________________________________________________________________
__________________________________________________________________
__________________________________________________________________
3 Nz σ.
4.2- Nz σ
4 ( ) ∆ ℓ:
:
____________________________________________________________
__________________________________________________________________
____________________________________________________________
__________________________________________________________________
______________________________________________________________
__________________________________________________________________
() :
__________________________________________________________________
5 :
:____________________________________________________________
__________________________________________________________________
- 4
: . ().
4.2
: (.)
_____
4.1-
:
1 Nz, .
:
) (, ), :
4.2-
2. :
ΣFix=0; ____________________________________________________________
__________________________________________________________________
__________________________________________________________________
ΣFiy=0; ___________________________________________________________
__________________________________________________________________
__________________________________________________________________
|
|
|
__________________________________________________________________
__________________________________________________________________
3 ()
__________________________________________________________________
__________________________________________________________________
__________________________________________________________________
__________________________________________________________________
__________________________________________________________________
__________________________________________________________________
:__ _______________________________________
