Page 381 - index

3.2. ɋɟɪɩɿɦɞɿ ɢɬɟɪɝɿɲɬɿ ɠΡɞɵɪɵΙɲɚ ɦɟɯɚɧɢɡɦɿɧɿΝ ɞɢɧɚɦɢɤɚɫɵ.
ɋɟɪɩɿɦɞɿ ɢɬɟɪɝɿɲɬɿ (ɲɵԑɭ ɛɭɵɧɞɵ) ɠԝɞɵɪɵԕɲɚ ɦɟɯɚɧɢɡɦɿɧɿԙ ɛɿɪɦɚɫɫɚɥɵ
ɞɢɧɚɦɢɤɚɥɵԕ ɦɨɞɟɥɿ 66-ɫɭɪɟɬɬɟ ɤԧɪɫɟɬɿɥɝɟɧ.

66-ɫɭɪɟɬ

ɂɬɟɪɝɿɲɬɿԙ ɦɚɫɫɚɫɵ m ɛɿɪ ɧԛɤɬɟɝɟ, ɹԑɧɢ ɨɧɵԙ ɠɨԑɚɪԑɵ ɲɟɬɿɧɟ

ɠɢɧɚԕɬɚɥԑɚɧ ɞɟɩ ɟɫɟɩɬɟɣɦɿɡ. ɂɬɟɪɝɿɲɬɿԙ ɫɟɪɩɿɦɞɿɥɿɤ ɤԛɲɿɧɿԙ ԥɫɟɪɿ, ɦɚɫɫɚ

m ɦɟɧ ɠԝɞɵɪɵԕɲɚɧɵԙ ɚɪɚɫɵɧɚ ɨɪɧɚɥɚɫԕɚɧ, ɫɟɪɿɩɩɟ ɚɪԕɵɥɵ ɛɟɣɧɟɥɟɧɝɟɧ.

Ɇɚɫɫɚԑɚ ɫɵɪɬԕɵ ɤԛɲ F~c ԥɫɟɪ ɟɬɟɞɿ. ɂɬɟɪɝɿɲɬɿԙ (ɫɟɪɿɩɩɟɧɿԙ) ɬԧɦɟɧɝɿ ɲɟɬɿ

ɠԝɞɵɪɵԕɲɚɦɟɧ ɛɿɪɝɟ ԕɨɡԑɚɥɚɞɵ, ɹԑɧɢ ɢɬɟɪɝɿɲɬɿԙ ɬԧɦɟɧɝɿ ɲɟɬɿɧɿԙ ɨɪɵɧ
ɚɭɵɫɬɵɪɭɵ s ɠԝɞɵɪɵԕɲɚɧɵԙ ɩɿɲɿɧɿɧɟ (ɩɪɨɮɢɥɿɧɟ) ɛɚɣɥɚɧɵɫɬɵ
ɚɧɵԕɬɚɥɚɞɵ. ɂɬɟɪɝɿɲ ɫɟɪɩɿɦɞɿ ɛɨɥԑɚɧɞɵԕɬɚɧ, ɨɧɵԙ ɠɨԑɚɪԑɵ ɲɟɬɿɧɿԙ ɨɪɵɧ
ɚɭɵɫɬɵɪɭɵ y ɬԧɦɟɧɝɿ ɲɟɬɿɧɿԙ ɨɪɵɧ ɚɭɵɫɬɵɪɭɵɧɚɧ ( s ) ԧɡɝɟɲɟ ɛɨɥɚɞɵ. Ɉɧɵ

ɦɚɫɫɚ m ԕɨɡԑɚɥɵɫɵɧɵԙ ɞɢɮɮɟɪɟɰɢɚɥɵ ɬɟԙɞɟɭɿɧɟɧ ɬɚɛɭԑɚ ɛɨɥɚɞɵ, ɹԑɧɢ

my c2 s y c1 y Fc , (4.45)

ɮɨɪɦɭɥɚɞɚԑɵ: ɫ1, ɫ2 –ɫɟɪɿɩɩɟɧɿԙ ɠԥɧɟ ɢɬɟɪɝɿɲɬɿԙ ԕɚɬɚԙɞɵԕ ɫԥɣɤɟɫ

ɤɨɷɮɮɢɰɢɟɧɬɬɟɪɿ, Fc – ԛɣɤɟɥɿɫ ɤԛɲɿɧɟɧ ɠԥɧɟ ɫɟɪɿɩɩɟɧɿ ɚɥɞɵɧ ɚɥɚ ɬɚɪɬɭ

ɤԛɲɿɧɟɧ ɬԝɪɚɬɵɧ ɫɵɪɬԕɵ ɤԛɲ.

Ɍԧɦɟɧɝɿ ɨɪɵɧ ɚɭɵɫɬɵɪɭɞɵԙ ( s ) ɭɚԕɵɬɬɚɧ t ɬԥɭɟɥɞɿɥɿɝɿ ɤɢɧɟɦɚɬɢɤɚɥɵԕ

ԕɨɡɞɵɪɵɥɭ ɞɟɩ ɚɬɚɥɚɞɵ, ԧɣɬɤɟɧɿ ɨɥ ɦɚɫɫɚɧɵԙ m ɫɟɪɩɿɦɞɿ ɬɟɪɛɟɥɿɫɿɧɟ

ɬɿɤɟɥɟɣ ԥɫɟɪɿɧ ɬɢɝɿɡɟɞɿ. Ȼԝɥ ԥɫɟɪɞɿ ԛɞɟɭɥɿɤ ɞɢɧɚɦɢɤɚɥɵԕ ɤɨɷɮɮɢɰɢɟɧɬ
ɚɪԕɵɥɵ ɛɚԑɚɥɚɭԑɚ ɛɨɥɚɞɵ:

Ʉ * y max . (4.46)
ɞɢɧ s max

379