Latvian Maritime academy

PH
h . (15)
b
Hence it results that the increase of rolling velocity influences negatively on the process of coating
compression.
In general case at mean velocity quantity v of the rolling with coating roll, the joint of sediment h
2
a
is determined as h
where quantity a is given by formula (11). Let’s determine the strength of
2R
roll on coating. Knowledge of this quantity allows determining the necessary power expenditures for the
process of restoration of inside surface of bush. The quantity of strength swinging on ground is
characterized by moment M , which is determined by formula
M b
a
0
d
Taking into consideration the formula (7), we shall find
b
m 2 b
2
M a a . (16)
2 3HR
M
The force of friction swinging F will be
R
b
m 2 b
2
F a a . (17)
2
2R
3HR
Putting the expression (11) into (16) and (17) we shall get the formula of moment dependences and
force of friction swinging from velocity and rolling. Let’s imagine these dependences in stretch
quantities. We shall put these stretch quantities as follows;
a P M
a ; q ; m ;
2
R bR
m bR m
(18)
u
H
m
then (16) and (17) will be:
1 2 1
m a ua
3 ;
2 3
(19)
1
a 1
2uq
1
u
These formulas reflect the dependence of strength on swinging roll, on rolling surface of coating from
rolling velocity.
At given quantity of angular velocity of rotation of roll rolling arrangement the number of
passage ways with rolls of each section of raised dust coating in unity of time, is:
1 3
3v
v .
T 2
2R
Then the general sediment or the compression of given coating section in time t after the beginning of
rolling process will be
taking into account that the joint of sediment
where
h
n
n
k
1
h
h
n t
. Then th
. Here taking into account that
h n
h from the previous quantity of sediment does not depend
2
a
h
and a is given by formula
2R
7