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2 / 1/ 2 ( )

, , ( / ). .

, .

(.1) , .

1. , . (.2) :

Fg , Fd ,Fa , Fsr .

2. :) ;) ; )

(Fd = 0), , Fa=Fsr, (.2) (Fsr = 0), (.2).

, R. , . , , . . , . .

, (K).

,

. - , - .

. () ().

, , .

, . , , : , , , .

. ( ), . , . , , (). . / ( ). (.3). . (.4). ( ), (.4).

3. 4. , ( .5). , . (.5,), .

, max (.5,).

5. nom (.5).

:

, :

F , A . . (.6). , . , , . , (.6). (.7) . , max.

6. 7. :

,

:

s ,

W . (.8). . :

,

:F ,

A .

8.

(.9). . , (.10).

(.10) . , max.

9.

10. :

,

:

,

Wp . (max) (nom) :

,

(. . , .

() (, , ) 2.35 .

. , , :

;

, (.5,). . , . ( ) . :

,

- . (.1) (.2.37 ). 1. ( (

0,40 0,85

0,65 0,95

0,95 1,00

0,00 0,40

0,25 0,50

, 5. , k . Rm, , . (k = 1). 5 - (. ), , , max () R. , , (, ) . . . . , , , . , , Rm, . ( ) (k 0). , , . - , . . k .:

1. .: , , , 2007b

(nom

(

(

(

F

F

F

F

2

1

)

)

a)

(

b

B

B

(

-

+

F

F

l

l1

d1

d

F

(max

b

F

C

l

l1

d1

d

F

R = -1

Fd

Fg

Fsr = 0

t

F

)

)

Fg

Fsr

Fd

Fa

)

b

B

max

nom

(max

(nom

max

nom

M

M

)

Fa

F

t

R = 0

Fg

Fd = 0

Fa = Fsr

F

t

)

R = 1

EMBED Equation.3

EMBED Equation.3

F=const

, F

, t

(

F

EMBED Equation.3

B

F

F

F

F

C-C

( , .

26

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