Page 166 - index

o oo
F (i) FSi (s 1,2,...n) . (9)
mS ɚS S 3n

Ɍɟԙɞɟɭɞɿ (9) ɞɟɤɚɪɬɬɵԕ ɨɫɶɬɟɪ ɤɨɨɪɞɢɧɚɬɵɧɚ ɩɪɨɟɤɰɢɹɥɚɩ,

ɞɢɮɮɟɪɟɧɰɢɚɥɞɵԕ ɬɟԙɞɟɭɥɟɪɞɿ ɚɥɚɦɵɡ, ɹԑɧɢ:

xx oo
F (i) FSix ,
mS xS Sx

xx oo (s 1,2,...n) (10)
F (i) FSiy ,
mS yS Sy

xx oo
F (i) FSiz .
mS zS Sz

Ȼԝɥ ɬɟԙɞɟɭɥɟɪ ɦɟɯɚɧɢɤɚɥɵԕ ɠԛɣɟɧɿԙ, ɞɟɤɚɪɬɬɵԕ ɤɨɨɪɞɢɧɚɬɬɚԑɵ
ԕɨɡԑɚɥɵɫɵɧɵԙ ɞɢɮɮɟɪɟɧɰɢɚɥɞɵԕ ɬɟԙɞɟɭɥɟɪɿ ɞɟɩ ɚɬɚɥɚɞɵ.

§3. Ⱦɢɧɚɦɢɤɚɧɵԙ ɧɟɝɿɡɝɿ ɟɤɿ ɟɫɟɛɿ
ɇԛɤɬɟ ɞɢɧɚɦɢɤɚɫɵɧɞɚ ɧɟɝɿɡɿɧɟɧ ɟɤɿ ɟɫɟɩ:
1) ɧԛɤɬɟɧɿԙ ɧɟɦɟɫɟ ɠԛɣɟɧɿԙ ɛɟɪɿɥɝɟɧ ԕɨɡԑɚɥɵɫɵ ɚɪԕɵɥɵ ɨɫɵ
ԕɨɡԑɚɥɵɫɬɚɪɞɵ ɬɭɞɵɪɚɬɵɧ ɤԛɲɬɿ ɚɧɵԕɬɚɭ;
2) ɧԛɤɬɟɝɟ ɧɟɦɟɫɟ ɠԛɣɟɝɟ ԥɫɟɪ ɟɬɭɲɿ ɛɟɪɿɥɝɟɧ ɤԛɲ ɚɪԕɵɥɵ, ɡɟɪɞɟɥɟɧɿɩ
ɨɬɵɪԑɚɧ ɨɛɴɟɤɬɿԙ ԕɨɡԑɚɥɵɫɵɧ ɚɧɵԕɬɚɭ ԕɚɪɚɫɬɵɪɵɥɚɞɵ.
Ⱦɢɧɚɦɢɤɚɧɵԙ ɧɟɝɿɡɝɿ ɟɤɿ ɟɫɟɛɿ – ɧԛɤɬɟ ԛɲɿɧ 7, 8-ɮɨɪɦɭɥɚɥɚɪ ɚɪԕɵɥɵ, ɚɥ
ɠԛɣɟ ԛɲɿɧ 10-ɮɨɪɦɭɥɚ ɚɪԕɵɥɵ ɲɟɲɿɥɟɞɿ.

ɇԛɤɬɟ ɞɢɧɚɦɢɤɚɫɵɧɵԙ ɛɿɪɿɧɲɿ ɧɟɝɿɡɝɿ ɟɫɟɛɿɧ ɲɟɲɭ
Ɇɚɫɫɚɫɵ m ɧԛɤɬɟɧɿԙ ԕɨɡԑɚɥɵɫɵ ɤɨɨɪɞɢɧɚɬɬɵԕ ɬԥɫɿɥɦɟɧ ɛɟɪɿɥɫɿɧ, ɹԑɧɢ:
x f1 (t) , y f2 (t) , z f3 (t) .

Ȼԝɥ ɮɭɧɤɰɢɹɥɚɪɞɵԙ ɟɤɿɧɲɿ ɬɭɵɧɞɵɥɚɪɵɧ ɚɥɵɩ, m, x, y, z ɦԥɧɞɟɪɿɧ 7-ɬɟΝɞɟɭɝɟ

ԕɨɹɦɵɡ. ɋɨɞɚɧ ɤɟɣɿɧ, ɬɟԙ ԥɫɟɪ ɟɬɭɲɿ ɤԛɲɬɿԙ ɤɨɨɪɞɢɧɚɬ ɨɫɶɬɟɪɿɧɞɟɝɿ Fx m xx ,

f1 (t)

Fy m xx , Fz xx ɩɪɨɟɤɰɢɹɥɚɪɵɧ ɬɚɛɚɦɵɡ, ɚɥ ɨɥɚɪɞɵԙ ɦɨɞɭɥɿ ɦɟɧ

f 2 (t) m f3 (t)

ɛɚԑɵɬɬɚɭɲɵ ɤɨɫɢɧɭɫɬɚɪɵ ɛԝɪɵɧɧɚɧ ɛɟɥɝɿɥɿ ɮɨɪɦɭɥɚɥɚɪ ɚɪԕɵɥɵ ɬɚɛɵɥɚɞɵ, ɹԑɧɢ:

F Fx2 Fy2 Fz2 ; cos(F&, i&) Fx ; cos(F&, &j ) Fy ; cos(F& , & Fz .
F F k)
F

ȿɝɟɪ ɦɚɫɫɚɫɵ m ɧԛɤɬɟɧɿԙ ԕɨɡԑɚɥɵɫɵ ɬɚɛɢԑɢ ɬԥɫɿɥɦɟɧ ɛɟɪɿɥɫɟ, ɨɧɞɚ:
- ɧԛɤɬɟ ԕɨɡԑɚɥɵɫɵɧɵԙ ɬɪɚɟɤɬɨɪɢɹɫɵ ɛɟɪɿɥɟɬɿɧ ɛɨɥԑɚɧɞɵԕɬɚɧ ɠԥɧɟ
ɧԛɤɬɟɧɿԙ ɬɪɚɟɤɬɨɪɢɹ ɛɨɣɵɦɟɧ ԕɨɡԑɚɥɵɫɵɧɵԙ ɡɚԙɵ ɛɟɥɝɿɥɿ ɛɨɥɚɬɵɧɞɵԕɬɚɧ,
ɬɟԙ ԥɫɟɪ ɟɬɭɲɿ ɤԛɲɬɿ 8-ɮɨɪɦɭɥɚɦɟɧ ɟɫɟɩɬɟɣɦɿɡ.
- ɬɟԙ ԥɫɟɪ ɟɬɭɲɿ ɤԛɲɬɿԙ ɦɨɞɭɥɿ ɦɟɧ ɛɚԑɵɬɬɚɭɲɵ ɤɨɫɢɧɭɫɬɚɪɵ:

2

F FW2 Fn2 xx §¨ x ¸· ; cosD FW s
¨¨© ¹¸¸ F
s2 s2 ¸¸¹· 2
U
s2 ¨§¨© s 2
U

ɮɨɪɦɭɥɚɥɚɪɞɚɧ ɬɚɛɵɥɚɞɵ.

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