. , . Fr (. . 2.1), . .
. .
. . , . . .
.
. .
σ .
. . 2.1 . , Fr.
=ω1/ω2=D2/[D1 (1ε)]≈D2/D1, |
ε ; ε = 0,0050,03.
u≤6.
. (. . 2.1)
a=(D1+D2)/2=D1(u+1)/2 |
D1=2a/(u+1). |
D2=D1 u |
. (. . 2.1) Rf≥Ft, Rf≥fFr.
Ft=2T2/D2. |
Fr=KFt/f, |
K ( ) , , . K= 1,252, K =35.
. . , , ... .
, (. . 2.1). , , , .
|
|
. () .
, , . (. . 2.2) (. 2.3). , , ..
. 2.3
, .
, , .
, ω2max ω2min:
=ω2max/ω2min=umax/umin=Rmax/Rmin=u²max. |
(2.4)
=38.
, .
. , , .
(. . 2.2) . , .. R2. . ... . R1=const,
= R2max/R2min. (2.5)
(. . 2.3) . . , .. R1 R2. :
umax=ω1/ω2min≈R2max/R1min, umin=ω1/ω2max≈R2min/R1max.
(. . 2.3) , . =23. =50 ... ŋ =0,80,9.
. 2.4
, , ; ; 30 ; ≤6; ŋ= 0,80,9.
. . 2.4 .
, R1 R2.
u=ω1/ω2≈R2/R1. (2.6)
|
|
, . ... 0,95.
, (. 2.5). ω2 . R1 . .
u=ω1/ω2 - R2/R1.
≤5.
. 2.5