Page 431 - index

( pb2 ) sc . (7.4)
Pl (7.5)

ɋɨԙԑɵ ɮɨɪɦɭɥɚɧɵ ɟɫɤɟɪɟ ɨɬɵɪɵɩ, 'b1kb2 ԛɲɛԝɪɵɲɵɧɚɧ

tg- sc e .
s R02 e2

Ⱥɭɵɬԕɭɫɵɡ ɦɟɯɚɧɢɡɦ ԛɲɿɧ

tg- sc . (7.6)
s R0

2.2. ɆΟɦɤɿɧ Ιɵɫɵɦ ɛΡɪɵɲɵɧ Ιɚɛɵɥɞɚɭ. ɀԝɞɵɪɵԕɲɚ ɦɟɯɚɧɢɡɦɞɟɪ ԛɲɿɧ
ɦԛɦɤɿɧ ԕɵɫɵɦ ɛԝɪɵɲɵɧ ԕɚɛɵɥɞɚɭɞɵԙ (ɬɚԙɞɚɩ ɚɥɭɞɵԙ) ɧɟɝɿɡɝɿ ɟɤɿ ɠɨɥɵɧ
ɚɬɚɭԑɚ ɛɨɥɚɞɵ: ɚ) ɦɟɯɚɧɢɡɦɧɿԙ ɝɚɛɚɪɢɬɿ (ɫɵɪɬԕɵ ɲɟɤɬɿɤ ɤԧɥɟɦɿ) ɲɟɤɬɟɥɟɞɿ;
ԥ) ɩɚɣɞɚɥɵ ԥɫɟɪ (ɠԝɦɵɫ) ɤɨɷɮɮɢɰɢɟɧɬɿ (ɉԤɄ) ɠɟɬɤɿɥɿɤɬɿ ɬԛɪɞɟ ԛɥɤɟɧ ɛɨɥɭ
ɤɟɪɟɤ.

Ɇɟɯɚɧɢɡɦɧɿԙ ɝɚɛɚɪɢɬɿ ԛɥɤɟɧ ɛɨɥɦɚɭ ԛɲɿɧ ɛɚɫɬɚɩԕɵ ɪɚɞɢɭɫɬɵ ( R0 )
ɤɿɲɿɪɟɣɬɭ ɤɟɪɟɤ. Ȼɿɪɚԕ ɛԝɥ ɤɟɡɞɟ (7.5) ɮɨɪɦɭɥɚɫɵɧɚ ɫԥɣɤɟɫ, ԕɵɫɵɦ ɛԝɪɵɲɵ
ԛɥɤɟɣɟɞɿ ɠԥɧɟ ɤɢɧɟɦɚɬɢɤɚɥɵԕ ɠԝɩɬɚɪɞɚԑɵ ɪɟɚɤɰɢɹɥɚɪ ԧɫɟɞɿ. Ɋɟɚɤɰɢɹɧɵԙ
ԧɫɭɿɧ ɿɲɤɿ ɤԛɲɬɟɪɞɿԙ ԧɫɭ ɤɨɷɮɮɢɰɢɟɧɬɿ ɚɪԕɵɥɵ ɛɚԑɚɥɚɭԑɚ ɛɨɥɚɞɵ:

F F21 . (7.7)
F

Ȼԝɥ ɮɨɪɦɭɥɚɞɚԑɵ: F21 – ɠԝɞɵɪɵԕɲɚɧɵԙ ɧɟɦɟɫɟ ɪɨɥɢɤɬɿԙ ɠɟɬɟɤɲɿ

ɢɬɟɪɝɿɲɤɟ ԥɫɟɪ ɪɟɚɤɰɢɹɫɵɧɵԙ ɦɨɞɭɥɿ, F – ɢɬɟɪɝɿɲɤɟ ɿɫɟɪ ɟɬɭɲɿ ԕɚɪɫɵɥɚɫɭ
ɤԛɲɿɧɿԙ (ɢɧɟɪɰɢɹ ɤԛɲɿɧ ԕɨɫɚ ɟɫɟɩɬɟɝɟɧɞɟɝɿ) ɦɨɞɭɥɿ.
ɟɫɟɩɬɟɝɟɧ ɤɟɡɞɟ,
ɀԝɞɵɪɵԕɲɚ ɦɟɯɚɧɢɡɦɞɿ ɤԛɲɤɟ ɚɥɵɧԑɚɧ ɛɨɥɚɬɵɧ. ɪȿɟɚɝɤɟɰɪɢɹFɧɵԙF2ɦɨɞmɭ2ɥa~ɿɧ2
ɚɧɵԕɬɚɭ ԛɲɿɧ (3.10) ɮɨɪɦɭɥɚɫɵ

ɛɨɥԑɚɧ ɤɟɡɞɟ (3.10) ɮɨɪɦɭɥɚɫɵɧ ɩɚɣɞɚɥɚɧɫɚԕ, ɨɧɞɚ:

F 1 . (7.8)
l 2z
cos- f sin -
l

ȱɲɤɿ ɤԛɲɬɟɪɞɿԙ ԧɫɭ ɤɨɷɮɮɢɰɢɟɧɬɿɧɿԙ ɲɟɤɬɿɤ ɲɚɦɚɫɵɧ ( F max ) ɛɟɪɟ

ɨɬɵɪɵɩ, ɫɨԙԑɵ ɮɨɪɦɭɥɚɞɚɧ ԕɵɫɵɦɧɵԙ ɦԛɦɤɿɧ ɛԝɪɵɲɵɧɵԙ ɬɟԙɞɟɭɿ
ɚɥɵɧɚɞɵ:

cos-ɦ f l 2 z sin- 1. (7.9)
l F max
ɦ

Ɇɵɫɚɥɵ, ɟɝɟɪ F max 2, f 0, z 0 ɛɨɥɫɚ, ɨɧɞɚ -ɦ 600 ; ɟɝɟɪ

F max 2, f 0,3 z 0 ɛɨɥɫɚ, ɨɧɞɚ -ɦ 440 , ɬɚԑɵ ɫɨɥ ɫɟɤɿɥɞɿ.
Ƚɚɛɚɪɢɬɿ ɤɿɲɤɟɧɟ ɦɟɯɚɧɢɡɦɧɿԙ ɩɚɣɞɚɥɵ ԥɫɟɪ ɤɨɷɮɮɢɰɢɟɧɬɿ (ɉԤɄ)

ɠɟɬɤɿɥɿɤɬɿ ɬԛɪɞɟ ԛɥɤɟɧ ɛɨɥɭ ԛɲɿɧ, ԛɣɥɟɫɿɦɞɿ (ɨɩɬɢɦɚɥɶ) ɥɟɡɞɿɤ ɉԤɄ

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