Page 25 - index

ɚɥɭ ԛɲɿɧ, ɚɥɞɵɦɟɧ ɨɧɵ ɠɚɡɵΙɬɵΙΙɚ ɩɪɨɟɤɰɢɹɥɚɩ, ɫɨɞɚɧ ɤɟɣɿɧ ɛɚɪɵɩ,
ɚɥɵɧΕɚɧ ɩɪɨɟɤɰɢɹɧɵ ɛɟɪɿɥɝɟɧ ɨɫɶɤɟ ɩɪɨɟɤɰɢɹɥɚɭ ɤɟɪɟɤ.

2.2. Ʉԛɲɬɿԙ ɦɨɞɭɥɿɧɿԙ ɠԥɧɟ ɛɚԑɵɬɬɚɭɲɵ ɤɨɫɢɧɭɫɬɚɪɵɧɵԙ ɮɨɪɦɭɥɚɥɚɪɵ.
Ʉԛɲɬɿԙ ɛɚԑɵɬɵɦɟɧ ɤɨɨɪɞɢɧɚɬɚ ɨɫɶɬɟɪɿɧɿԙ ɚɪɚɥɚɪɵɧɞɚԑɵ ɛԝɪɵɲɬɚɪ, ԥɞɟɬɬɟ,
ɤԛɲɬɿԙ ɛɚԑɵɬɬɚɭɲɵ ɤɨɫɢɧɭɫɬɚɪɵ ɞɟɩ ɚɬɚɥɚɞɵ.

Ɏɨɪɦɭɥɚɥɚɪɞɵ ԕɨɪɵɬɭ ԛɲɿɧ Oxyz ɤɨɨɪɞɢɧɚɬɬɚɪ ɠԛɣɟɫɿɧ ɚɥɚɣɵԕ (22-ɫɭɪɟɬ).

Ɉɫɶɬɟɪɞɿԙ ɛɿɪɥɿɤ ɜɟɤɬɨɪɥɚɪɵɧ k , i , j ɫɢɦɜɨɥɞɚɪɵɦɟɧ ɛɟɥɝɿɥɟɣɦɿɡ.

Ʉɨɨɪɞɢɧɚɬɚ ɛɚɫɵɧɚ ɨɪɧɚɥɚɫԕɚɧ F ɤԛɲɿɧ ɤɨɨɪɞɢɧɚɬɚ ɨɫɶɬɟɪɿɦɟɧ
ɛɚԑɵɬɬɚɥԑɚɧ ԛɲ ԕԝɪɚɭɲɵԑɚ ɠɿɤɬɟɣɦɿɡ, ɨɥɚɪ: F1 , F2 , F3 . Ȼԝɥ ɤԛɲɬɟɪɞɿ ɛɿɪɥɿɤ

ɜɟɤɬɨɪɥɚɪɵ ɚɪԕɵɥɵ ɤԧɪɫɟɬɫɟɤ: F1 Fx ˜i , F2 Fy ˜ j ɠԥɧɟ F3 Fz ˜ k .

22-ɫɭɪɟɬ

Ȼԝɥ ɮɨɪɦɭɥɚɥɚɪɞɚԑɵ Fx , Fy , Fz ɤԛɲɬɿԙ ɫԥɣɤɟɫ ɨɫɶɬɟɪɞɟɝɿ ɩɪɨɟɤɰɢɹɥɚɪɵ

ɛɨɥԑɚɧɞɵԕɬɚɧ:

F F1 F2 F3 Fx ˜ i Fy ˜ j Fz ˜ k . (2)

Ⱥɥɵɧԑɚɧ ɮɨɪɦɭɥɚɞɚԑɵ
- F1 , F2 , F3 ɤԛɲɬɟɪɿ F ɤԛɲɿɧɿԙ ɤɨɨɪɞɢɧɚɬɚ ɨɫɶɬɟɪɿɧɞɟɝɿ ԕԝɪɚɭɲɵɥɚɪɵ
ɞɟɩ;
- Fx , Fy , Fz ɤԛɲɬɟɪɿ ɤԛɲɬɿԙ ɤɨɨɪɞɢɧɚɬɬɚɪɵ ɞɟɩ ɚɬɚɥɚɞɵ.

Ɍɿɤɛԝɪɵɲɬɵ ɩɚɪɚɥɥɟɩɢɩɟɞɬɟɧ ɤԛɲɬɿԙ ɦɨɞɭɥɿɧ ɚɧɵԕɬɚɣɦɵɡ. Ɉɥ ɤԛɲ
ɩɚɪɚɥɥɟɩɢɩɟɞɬɿԙ ɞɢɚɝɨɧɚɥɵ OD , ɞɟɦɟɤ,

F Fx2 Fy2 Fz2 . (3)

ɋɨɧɵɦɟɧ ԕɨɫɚ, Fx F ˜ cosD , Fy F ˜ cos E , Fz F ˜ cosJ , ɚɥ D , E ɠԥɧɟ
J ɛɟɪɿɥɝɟɧ F ɤԛɲɿɦɟɧ ɤɨɨɪɞɢɧɚɬɚ ɨɫɶɬɟɪɿɧɿԙ ɚɪɚɥɚɪɵɧɞɚԑɵ ɛԝɪɵɲɬɚɪ

ɛɨɥԑɚɧɞɵԕɬɚɧ:

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