. . , .
. 23.9 . 1 qF, (23.23).
qF : qFt = qFcos α'; qFr = qFsin α',
α' , qF .
23.9
, , qFt σ, qFr σ (. . 23.9):
σ = qFt l/W0 = 6 qF l cos α'/α2; σ = qFr /A = qF sin α'/α.
. 23.9 σf . ( ), ,
σf = Yβ (σ σ) αk ≤ [σ]F, (23.29)
Yβ , ; αk .
l a (. . 23.9) : l = λ1 : = λ 2
(λ1 λ2 ). σ σ (23.29),
σf = Yβ αk [6qF λ1 mn cos α'/(λ22 m2n) qF sin α'/(λ2 mn)] =
= (qF Yβ αk/mn) (6 λ1 cos α'/ λ22 sin α'/ λ2) ≤ [σ]F.
(23.23) .
σf = YF Yε Yβ WFt/mn < [σ] f. (23.30)
WFt , (23.21):
WFt= (FFt/b) Fα, Fβ, KFv.
(23.30) : YF ( l, , α' , αk); YF ZV [. (23.9)] ; ( = 0) YF . 23.5,
YF= 4z /(z + 20);
Yε , () Yε=1; Yβ , Yβ = 1, Yβ = 1 β/140.
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, YF1 YF2 z1 ≠ z2.
(23.30) , , . ̳ , .
, . T1 max ( ), σF .
, :
σ max = σ F (T1 max / T1 F) ≤ [σ] F max, (23.31)
σ F max ; σ F , 䳺 T1F; [σ] F max .