Page 578 - index
P. 578

Iy  2˜  ª«151     26,7  ˜ 16   8,2    2,212     1˜ 323  º  11110 ɫɦ4;
        ¬                                               12    »
                                                              ¼

Ix  2 ˜ §©¨¨ 2110    32 ˜13   32 ˜1˜11,52  ·¸¸¹  12690 ɫɦ4. I x        I y ɛɨɥԑɚɧɞɵԕɬɚɧ,
                       12

ԕɢɦɚɧɵԙ ɟԙ ɤɿɲɿ ɪɚɞɢɭɫ ɢɧɟɪɰɢɹɫɵ: imin iy                        Iy        11100  9,73 ɫɦ.
                                                                 A         117,4

Ⱦɿԙɝɟɤɬɿԙ ɦɚɣɵɫԕɵɲɬɵԑɵ O                  P ˜l        1˜ 60      61,7 .
                                          imin        9,73

    Ȼԝɥ ɦɚɣɵɫԕɵɲɬɵԕԕɚ ɫԥɣɤɟɫ M ɧɟɝɿɡɝɿ ɦԛɦɤɿɧ ɤɟɪɧɟɭɞɿ ɬԧɦɟɧɞɟɬɭ

ɤɨɷɮɮɢɰɢɟɧɬɿɧɿԙ ɤɟɫɬɟɫɿɧɟɧ ɫɵɡɵԕɬɵԕ ɢɧɬɟɪɩɨɥɹɰɢɹɥɚɭ ɚɪԕɵɥɵ ɬɚɛɵɥɚɞɵ.

Ȼɟɪɿɥɝɟɧ ɋɬ.3 ɛɨɥɚɬɵ ԛɲɿɧ M 0,852 . ȱɡɞɟɥɿɩ ɨɬɵɪԑɚɧ ɟԙ ԛɥɤɟɧ ɦԛɦɤɿɧ

ɠԛɤɬɟɦɟ:

  >P@ M ˜ >V @˜ A 0,852 ˜1600 ˜117,4 | 160000 ɤɝ.

                                                   132-ɫɭɪɟɬ

    Ɍɨɣɬɚɪɦɚ ɲɟɝɟɥɟɪɞɿԙ ɞɢɚɦɟɬɪɿɧɟ ɫԥɣɤɟɫ ɬɟɫɿɤɬɟɪ ɛɨɥԑɚɧɞɵԕɬɚɧ, ԕɢɦɚɧɵԙ
ɚɭɞɚɧɵ ɫɨɥ ɲɚɦɚԑɚ ɤɟɦɢɞɿ, ɹԑɧɢ ɬɚɡɚ ɚɭɞɚɧ:
        Aɧ Aɛɪ  4d (tɥ  tɲɜ ) 117,4  4 ˜ 2 ˜ (1  0,95) 101,8 ɫɦ2.

    Ȼɟɪɿɤɬɿɤ ɲɚɪɬɵɧɚɧ:

        V max            P    d >V @ Ÿ    P d >V @˜ Aɧ        1600 ˜101,8  162900 ɤɝ/ɫɦ2.
                         Aɧ

    ɋɨɧɵɦɟɧ, ɞɿԙɝɟɤ ɤԧɬɟɪɟ ɚɥɚɬɵɧ ɦԛɦɤɿɧ ɠԛɤɬɟɦɟɧɿԙ ɲɚɦɚɫɵ ɨɪɧɵԕɬɵɥɵԕ
ɲɚɪɬɵɧɚɧ ɚɧɵԕɬɚɥɚɞɵ, ɨɥ: >P@ 160 ɬ.

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