o ‘r a m i s i r t i g a t e g i b t u r i s h i t o ‘ la b o i m a s l i g i n a t i j a s i d a k o n t a k t c h i z i g ‘ i
u z u n l i g i n i k i c h r a y i s h i n i h i s o b g a o l u v c h i k o e f f i t s i y e n t , n a t i j a d a
{
0 . 5 4 - S e J = W
-0.S5_3J4-1.85.Q 75 = ,- 2 |J b u n d a n
cos у
cos 10
F, KH
_
2 ТЖ, ,
_ 1 J 9 T2K
h
,
Cosa-Cosy ■
(.£ d2 -Cosa Cosy
-1,21c/,
d:dl
Z
e
, q , / ? K - q i y m a t l a r i n i 1- f o r m u l a g a q o ‘y i b q u y i d a g i i f o d a n i o l a m i z :
~
V
q
I
Ъ П Т,К И
480 1 7 ж ^ ^ г
,
q H- Z EJ-g- = 148,
(2)
\ /О,
v
d
2' <^i ’ 0,17 • c/2
bu yerda: K H= K N(3 *K H r - yuklanish koeffitsiyenti. K Hr ~ q o ‘shim cha
dinam ik yuklanishlarni
hisobga oluvchi koeffitsyenti, qiymati
V3
<3m/s
b o i g a n d a К
Hy=l , 0, V3 >
3m/s b o i g a n d a К ш —1,1-1,3.
K Np-y u k la n ish n i
t o ‘planishini hisobga oluvchi koeffitsiyent K Np= 1,0.
F o rm u la (2) y ordam ida kontakt kuchlanishning hisobiy qiymati
aniqlanadi, uzatmani o ‘qlararo
m asofaga nisbatan yechamiz, bunda:
d i= q m = q d 2./Z2;
d 2= m Z 2;
a= 0,5m (q+ Z 2)=0,5d2(q/Z 2+ l.);
d 2= a(0 ,5 (q /Z 2+ l)) ; qiymatlarini 2-form ulaga q o ‘yib quyidagi ifodani
olamiz:
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