' . ' 䳿 ' . 䳭 ' . .
ij 2 ' Fn ' . 䳺 , (. 28.7, ), αn ' ' .
Fn Fr2 Fo. ' . Fr2 , Fo . Fo Ft2 F2. , Ft2, Fr2 Fa2.
'
Ft2 = 2T2/d2. (28.24)
'
Fa2 = Ft2 tg γ. (28.25)
Fr2 F0 = Ft2 /cos γ,
Fr2 = F0 tg αn = Ft2 tg αn / cos γ.
, tgαn /cosγ = tg α, α = 20o , , :
Fr2 = Ft2 tg α (28.26)
Fn Ft2, Fr2 Fa2,
Fn = F0/cos αn = Ft2 /(cos αn cos γ). (28.27)
' , (. 28.7, ), .
' ' :
Ft1 = Fa2 = Ft2 tgγ. (28.28)
' 㳿
Fa1= Ft2 = 2T2/d2. (28.29)
' :
Fr1=Fr2 = Ft2 tgα. (28.30)
' . ' , ,
q = (Fn / l∑) Kβ Kv. (28.31)
Fn (28.27); l∑ . Kβ, ' , Kv , .
'
l∑ = b2 εα/cosγ, (28.32)
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b2 ' ; γ , '; εα , ' 1,82,2.
(28.32) ' , ' 2δ ϳ (28.27) (28.32) (28.31),
q = wt / (εα cos αn). ( 28.33)
wt ,
wt = (Ft2 / b2)KβKv. (28.34)
㳺 :
qH = wH t /(εα cos αn); wH t = (FH t2 /b2) H β HV; (28.35)
qF = wF t /(εα cos αn); wF t = (FF t2 /b2) F β FV (28.36)
FH t2 FF t2 :
FH t2 = 2T2H /d2; FF t2 = 2T2F/d2, (28.37)
T2H= T2F= T2 .
' Hβ = Fβ HV = FV.
, ' ,
Kβ = 1+(z2/θ)3 (1x). (2838)
z2 ' ; θ ' (. 28.5); , .
KV ' . 28.6.