. . 30.5 , , ' , .
. 30.5. ʳ
, . , .
䳭
: () m = 800 , v = 0,05 /.
'. 1. . ,
,
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: η1 = 0,45 ; η2 = 0,9 .
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, Ρ = 3 (. . 30.1) z = 1. (30.2)
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4712 쳭 = 1,1 n =2880 /.
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2. . : 45, , σΒ = 598 , a σ = 363 (. . 3.1); 20. [] = 5 .
' .
(30.11) ε = H/d2 = 1,5 λ = 1/= 0,75 ( )
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. 30.1 : P = 3 ; d=26 ; d1 = 20,795 ; d2 = 23,75 .
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H =36 .
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tg ψ = Pz/(πd2) = 3 1/(3,14 23,75) = 0,040207; ψ = 2,30248.
f = 0,05 (. 5.1) δ = 3 (30.6)
tg φ' = f/cos δ = 0,05/cos 3 = 0,050069; φ' = 2,86633.
, φ' > ψ. (30.8) 䳿 :
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.
3. .
|
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[ (30.10)]
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, p = 3,9 < [p] = 5 .
4. . (30.12)
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k = 0,5.
[τ]3 = 45 . .
5 . 䳺 . d1
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( ) 䳺 Ts ( ):
;
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