R S mB = 0,
R∙l P (l x) = 0.
. . R = . (3.6)
R S mA = 0,
R∙l P∙ x = 0.
:
. . R = . (3.7)
R R . 3.8.
, , .
() , .
= 1 . .
, R∙l 1 H∙f = 0.
. (3.8)
H.
- = 1 . , R∙l 2 - H∙f = 0.
. (3.8)′
. (3.8).
M = M ∙.
,
.. M = .. M (..),
- M ∙. .
1. M ( . 3.9 ).
2. , ( ). , , , ( . ) ( . ).
3. M ∙ ( . 3.9 M).
F′ M.
F′ (). M . , , .
, , M = 0, . , F′.
M 1∙ , F′ - 1- . 1- 2- ( ).
1- , .
|
|
. ( )
(3.9)
.
(3.3)
Q = Q cos j sin j . (3.3)
cos j sin j ,
.. Q = (.. Q) cos j (..) sin j .
Q , . (. 3.10).
1. Qcos j .
2. sin j , , (l 2/ f) sin j .
3. () , (3.3).
, . . sin j . . Qcos j F 1′, . , = 1 , , , .
, . F 1.
, . , cos j 1- F 1′. 1- 2- . , 1- (. 3.10).
F 1
(3.10)
.
, .
N = Q sin j cos j , (3.4)
:
.. N = (.. Q) sin j + (..) cos j .
, .
(. 3.11).
1. Q sin j .
2. cos j ( ).
3. .
(..) cos j (.. Q) sin j F 2′. , , . n, N = 0, . .
.
N . F 2′, sin j 1- . 2- , 1- . 1- .
|
|
(3.11)
3.3. . .
. RA, RB H , (. 3.12).
φ.
yk =
φ k = 33,6, sinφ k = 0.554, cosφ k = 0.836.
(. 3.13).
3.4. . (. 3.14).
d φ φ d.
xk = 3 , xd = 6 .
φ k = 45, sinφ k = 0.707, cosφ k = 0.707,.
φ d() = 45, sinφ d() = 0.707, cosφ d() = 0.707.
φ d() = 0, sinφ d() = 0, cosφ d() = 1.
(. 3.14, 3.15). Qd() Nd() .