Page 382 - index
P. 382
ɀԝɞɵɪɵԕɲɚ ɦɟɯɚɧɢɡɦɿ ɬɟɤ ɢɧɟɪɰɢɹɥɵԕ ɤԛɲɩɟɧ Fc , c1 0 ɠԛɤɬɟɥɫɿɧ.
Ȼԝɥ ɤɟɡɞɟɝɿ ԕɨɡԑɚɥɵɫɬɵԙ ɬɟԙɞɟɭɿ: (4.47)
q O2q s,
ɬɟԙɞɟɭɞɟɝɿ: q y s – ɢɬɟɪɝɿɲɬɿԙ ɞɟɮɨɪɦɚɰɢɹɫɵ, O c2 – ɦɟɯɚɧɢɡɦɧɿԙ
m
ɦɟɧɲɿɤɬɿ ɠɢɿɥɿɝɿ.
ɂɬɟɪɝɿɲɬɿԙ ɬԧɦɟɧɝɿ ɲɟɬɿɧɿԙ ԕɨɡԑɚɥɵɫ ɡɚԙɵɧ
s h Z 2 cos Zt
2
ɬԛɪɿɧɞɟ ԕɚɛɵɥɞɚɣɵԕ.
Ȼԝɥ ɮɨɪɦɭɥɚɞɚԑɵ: ta – ɭɚԕɵɬɵɧɚ ɫԥɣɤɟɫ ɢɬɟɪɝɿɲ ɤԧɬɟɪɿɥɝɟɧ
ɚɪɚԕɚɲɵԕɬɵԕ, Z S – ɤɢɧɟɦɚɬɢɤɚɥɵԕ ԕɨɡɭɞɵԙ ɠɢɿɥɿɝɿ.
ta
ɋɨԙԑɵ ɬɟԙɞɟɭɞɿ ɟɫɤɟɪɟ ɨɬɵɪɵɩ, Ʌɚɩɥɚɫɬɵԙ ɬԥɫɿɥɿɧ ԕɨɥɞɚɧɵɩ (4.47)
ɬɟԙɞɟɭɿɧɿԙ ɲɟɲɭɿɧ ɚɥɭԑɚ ɛɨɥɚɞɵ:
q h Z2 2 cos Ot cos Z t .
2 O2 Z
ɍɚԕɵɬ ɛɨɣɵɧɲɚ ɟɤɿ ɪɟɬ ɞɢɮɮɟɪɟɧɰɢɚɥɞɚԑɚɧɧɚɧ ɤɟɣɿɧ:
hZ 2
2 O2 Z 2
q
Z 2 cosZt O2 cos Ot .
Ԧɡɝɟɪɦɟɥɿ ɲɚɦɚ y ɚɪԕɵɥɵ ԧɪɧɟɤɬɟɩ ɤɟɥɟɫɿ ɬɟԙɞɟɭɞɿ ɚɥɚɦɵɡ:
hZ 2O2 cosZt cos Ot.
2 O2 Z 2
y
ɂɬɟɪɝɿɲ ԛɞɟɭɿɧɿԙ O 10 ɲɚɦɚɫɵɧɚ ɫԥɣɤɟɫ ԧɡɝɟɪɭ ɝɪɚɮɢɝɿ 67-ɫɭɪɟɬɬɟ
Z
ɤԧɪɫɟɬɿɥɝɟɧ ( y – ɫɟɪɩɿɦɞɿɥɿɤɬɿ ɟɫɤɟɪɝɟɧɞɟ, s – ɫɟɪɩɿɦɞɿɥɿɤɬɿ ɟɫɤɟɪɦɟɝɟɧɞɟ).
Ԛɞɟɭɥɿɤ ɞɢɧɚɦɢɤɚɥɵԕ ɤɨɷɮɮɢɰɢɟɧɬ (4.46) ɛɨɣɵɧɲɚ:
Ʉ * O2 ɫosZt cos Ot max # 2.
ɞɢɧ O2 Z 2
ȿɝɟɪ ɛɟɥɝɿɥɿ ɛɿɪ ɫԥɬɬɟ ԛɞɟɭ ɦɨɞɭɥɿ ɛɨɣɵɧɲɚ ԑɚɧɚ ɟɦɟɫ, ԧɡɿɧɿԙ ɛɚԑɵɬɵɧ ɞɚ
ԧɡɝɟɪɬɫɟ, ɨɧɞɚ ԛɞɟɭɥɿɤ ɞɢɧɚɦɢɤɚɥɵԕ ɤɨɷɮɮɢɰɢɟɧɬ: Ʉ* # 3 . Ⱥɥ O ɲɚɦɚɫɵ
ɞɢɧ Z
380
