. , . :
(s1¥ = s3¥)
a2
sr = s1¥ (1 - -----);
r2
(12.3)
a2
sq = s1¥ (1 + -----);
r2
(s1¥ ¹ s3¥)
a2 s3¥ + s1¥s3¥ + s1¥ a2
sr = (1 - ----) [-------------- + ------------- (1 - 3-----) cos 2q ];
r2 22 r2
s3¥ + s1¥ a2 s3¥ - s1¥ a4
sq = -----------(1 + ----) - ----------- (1 + 3-----) cos 2q;(12.4)
2 r2 2 r4
s3¥ - s1¥ a2 a4
trq = - -----------(1 + 2---- - 3------) sin 2 q;
2 r2r4
s3¥ s1¥ ; ; r, q .
(12.3), (12.4), .
(, ) , .. , ( = si / s¥), = 2 (. 12.2).
. 12.2. - - (s3¥ = s1¥).
(s3¥ ¹ s1¥) (), , s3¥ s1¥. .
.
1. - , .. , .. s1¥/s3¥ = n/(1-n). n = 0.2 s1¥ = 0.25 s3¥. (. 12.3).
. 12.3. - .. ( v = 0,2; s1¥ = 0.25 s3¥)
2,75. .
2. - -, .. s1¥ = 2 s3¥ (. 12.4) s1¥ = 10 s3¥ (. 12.4).
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, 5 29.
. 12.4. .
- s1¥ = 2 s3¥; - s1¥ = 10 s3¥).
, , (, ).
, L , . . , .
(12.4) , () , [L = 1.65d ( d = 2 a)], , 5%.
sq sr . , , , .
, s1¥ =0.25 s3¥ sq , L = 1.35d 5% . ( ) L = 2.75d.
s1¥ =2 s3¥ s1¥ =10 s3¥ sq , L = 1.5d. L = 1.25d. . , sr 5% L = 2.5d . (L = 7d ).
, .
. . , . , , , () s1¥ = s2¥ = s3¥, (q; r; j)
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sq = sj = s1¥[1 + a3 / 2 r3] (12.5)
sr = s1¥[1 - a3 / r3].
(.12.5) , . , L=0,8 d , = 1,5.
.12.5. .
, , , , .
.
. 12.6 / = 2, , .
. 12.2; 12.3; 12.4; 12.6 , . sq .
, . . . , 1.2 (
5%).
. 12.6. /=2 .
( ) s1¥ s3¥ .
/ = s3¥ / s1¥ . , .
(. 12.7). .
.12.7. () () .
. .