, , . , .
- , , .
η, η η , , - , .
(6.8), :
(18.32)
φ' . 18.4. , . . , . φ' vs, , .
18.4. φ' v,
Vs / | φ' | Vs / | φ' | Vs / | φ' |
1,0 1,5 2 | 2"30'...310' 2"20'...250' 200'...230' | 2,5 3 4 | 40'...220' '...200' 20'...40' | 7 10 15 | 00'...30' 0-55'... 20' 050'...10' |
. φ' , .
(18.32) , ψw . =0 [. (18.8)], tg ψw = z1 / q , q, q .
, ( = 0,75...0,92).