75
Thus, first we investigate the distribution of the studied quantities
22
0
/
T h P
,
2
0 2
/ (
)
v
h
P c
and
1
0 2
/ (
)
v h
P c
on the interface plane with respect to the dimensionless coordinate
1
x h
. We recall that here
the coordinate
1
x
is determined with respect to the moving coordinate system and, according to the
coordinate transformation
1
1
'
x
x
Vt
,
2
2
'
x
x
which was introduced in the beginning of the previous
section (the upper prime over the moving coordinates was omitted), the change in the values of the
1
x h
(i.e. of the
1
'
x
h
) can also be considered as a change in the values of the dimensionless time
/
Vt h
.
Consequently, the distribution of the foregoing quantities with respect to the moving dimensionless
coordinate
1
x h
can also be considered as the change of those at some fixed point in the frame of the fixed
coordinate system with respect to the dimensionless time
/
Vt h
. Graphs of these distributions are given in
Figs. 1 (for the
22
0
/
T h P
), 2 (for the
2
0 2
/ (
)
v
h
P c
), 3 (for the
1
0 2
/ (
)
v h
P c
in the viscous fluid case) and 4
(also for the
1
0 2
/ (
)
v h
P c
in the inviscid fluid case).
Fig. 3.
The distribution of the
1
0 2
/ (
)
v h
P c
with
respect of the
1
x h
in the
viscous fluid case
Note that these graphs are constructed in the case where
500 (1/ )
V h
s
for various values of the
h
. In Figs. 1 and 2 the results related to the viscous and corresponding inviscid fluid cases are given
simultaneously. Here and below under "inviscid fluid case" ("viscous fluid case") we will understand the
case where the selected fluid (i.e. Glycerin) is modeled as inviscid (viscous) one. However, the results
obtained for the
1
0 2
/ (
)
v h
P c
in the viscous fluid case incompatible with those obtained in
the inviscid fluid
case. Therefore the results obtained for the
1
0 2
/ (
)
v h
P c
in the viscous and inviscid fluid cases are given
separately in Figs. 3 and 4 respectively. The mentioned incompatibility can be explained with disappear of
the contact condition
2
1
x
h
u
t
2
1
x
h
v
in (3) for the inviscid fluid case. Consequently, according to
the results given in Figs. 3 and 4, we can conclude that the distribution of the velocity
1
0 2
/ (
)
v h
P c
cannot
be described within the scope of the inviscid fluid model not only in the quantitative sense, but also in the
qualitative sense.
76
Fig. 4. The distribution of the
1
0 2
/ (
)
v h
P c
with respect of the
1
x h
in the inviscid fluid
case
The analysis of the graphs in these figures shows that the attenuation of the investigated quantities
with
1
x h
takes place more rapidly and the width of the action area of the moving load decrease with
increasing of the plate thickness
h
under fixed value of the velocity of the moving load. We again note that
the foregoing results can also be estimated as the change of the studied quantities with respect to time at a
certain fixed point of the interface plane. For instance, we consider a point which is in a distance
L
from
the origin of the fixed coordinate system. According to the relation
1
0
x
L Vt
, we determine the time
*
t
L V
at which the moving load achieves this point. Consequently, the left (right) branch of the graphs
given in Figs. 1 – 4 which illustrate the change of the studied quantities with respect to the
1
x h
under
1
0
x h
(under
1
0
x h
) can also be taken as the change of those with respect to time
t
under
*
t
t
(under
*
t
t
) at the point which is
in a distance
L
from the origin of the fixed coordinate system.
Fig. 5. The graphs of the dependence between
22
0
/
T h P
and
V h
Fig. 6. The graphs of the dependence between
2
0 2
/ (
)
v
h
P c
and
V h