Page 570 - index

Ȼԝɥ ɠԛɣɟɧɿԙ ɟɤɿ ɲɟɲɿɦɿ ɛɨɥɚɞɵ:
1) ɋ1 =ɋ2 =Rc =0 , ɛԝɥ ɤɟɡɞɟ ɭ=ɨ , ɹԑɧɢ ɟɫɟɩɬɿԙ ԕɨɣɵɥɭ ɲɚɪɬɵɧɚ ԕɚɣɲɵ;
2) ɋ2 z0 ɠԥɧɟ Rc z0, ɛԝɥ ɤɟɡɞɟ, ɿɡɞɟɥɿɩ ɨɬɵɪԑɚɧ ɲɚɦɚɥɚɪɞɵԙ ɋ1, ɋ2 ɠԥɧɟ
Rc ɤɨɷɮɮɢɰɢɟɧɬɬɟɪɿɧɟɧ ɬԝɪɚɬɵɧ ɚɧɵԕɬɚԑɵɲ ɧԧɥɝɟ ɬɟԙ ɛɨɥɭ ɤɟɪɟɤ, ɹԑɧɢ:

0 ˜ ˜ ˜ ˜ ˜ ˜ ˜ ˜ ˜ ˜ ˜ ˜ ˜1 ˜ ˜ ˜ ˜ EI 1 k 2
˜
. (10.22)
k ˜ ˜ ˜ ˜ ˜ ˜ ˜ ˜ ˜ ˜ ˜ 0 ˜ ˜ ˜ 1
EI ˜ k 2 0

Sinkl ˜ ˜˜ cos kl ˜ ˜˜ ˜ ˜ ˜0

Ⱥɧɵԕɬɚԑɵɲɬɵ ɚɲԕɚɧɧɚɧ ɤɟɣɿɧ: (10.23)
tgk" k" .

Ɍɟԙɞɟɭɞɿԙ ɲɟɲɭɿ:

arctgk" i k ˜ " i1 S . (10.24)

Ƚɪɚɮɢɤɚ ɠɨɥɵɦɟɧ ɲɟɲɭ ɨԙɚɣ ɛɨɥԑɚɧɞɵԕɬɚɧ, (10.23) ɮɨɪɦɭɥɚɞɚԑɵ
ɮɭɧɤɰɢɹɥɚɪɞɵԙ ɝɪɚɮɢɤɬɟɪɿɧ ɬԝɪԑɵɡɚɣɵԕ (127-ɫɭɪɟɬ).

Ȼԝɥ ɝɪɚɮɢɤɬɟɧ, ɧԧɥɞɟɧ ɛɚɫԕɚ, ɟԙ ɤɿɲɿ ɬԛɛɿɪɞɿԙ ɠɭɵԕ ɲɚɦɚɫɵɧ ɬɚɛɭԑɚ
ɛɨɥɚɞɵ.

127-ɫɭɪɟɬ

Ԕɚɪɚɥɵɩ ɨɬɵɪԑɚɧ ɟɫɟɩɬɟ, ɿɡɞɟɥɿɩ ɨɬɵɪԑɚɧ k" ɲɚɦɚɫɵ 3S ɲɚɦɚɫɵɧɚɧ ɫԥɥ
2

ɚɡɵɪɚԕ ɟɤɟɧɿ ɤԧɪɿɧɿɩ ɬԝɪ (127-ɫɭɪɟɬ). ɋɨɧɞɵԕɬɚɧ k"1 4 ɞɟɩ ɚɥɵɩ, (10.24)

ɮɨɪɦɭɥɚɧɵԙ ɤԧɦɟɝɿɦɟɧ ɛɿɪɧɟɲɟ ɪɟɬ ɟɫɟɩɬɟɣɦɿɡ. ɋɨɧɵԙ ɧԥɬɢɠɟɫɿɧɞɟ
ɤ ˜ " 4,49 ɟɤɟɧɿɧ ɞԥɥɟɥɞɟɣɦɿɡ. ɋɨԙɞɵԕɬɚɧ:

Pɞ 4,492 EI S 2 EI . (10.25)
l2 (0,7l ) 2

568