ISSN 1607-2774
Семей қаласының Шәкәрім атындағы мемлекеттік университетінің хабаршысы № 4(92)2020
120
;
2
1
0
s
r
R
y
w
;
s
s
ss
;
s
R
R
y
.
2
1
R
R
s
y
s
s
Turning on the formulas (12) to the physical components, we get
;
1
0
w
R
s
s
s
ss
;
2
1
R
R
s
y
s
s
;
1
0
w
R
R
R
y
s
;
2
1
0
s
s
s
rs
R
s
w
(15)
;
2
1
0
R
y
w
r
;
s
s
ss
;
s
R
R
y
;
2
1
R
R
y
s
s
s
In the future we will consider orthotropic material, so Hooke's law for the physical components of
force, moment, and deformation tensors is as follows [7]:
;
1
2
2
1
1
ss
ss
h
N
;
1
1
2
1
2
ss
h
N
;
2
s
s
s
s
hG
N
N
;
2
2
rs
rs
s
hG
k
Q
(16)
;
2
2
r
r
hG
k
Q
;
1
2
2
1
1
ss
ss
I
M
;
1
1
2
1
2
ss
I
M
.
2
s
s
s
s
IG
M
M
Here
2
1
2
1
,
,
,
− Jungian modules and Poisson's coefficients in the directions
s
and
respectively, and
;
1
2
2
1
r
rs
s
G
G
G
,
,
− shear moduli.
Thus equations (14) - (16) comprise the complete system for determining displacements,
normal angles, forces, moments and deformations.
Let's consider the left end of the shell with an absolutely
hard drive attached to it, the
thickness
H
2
, radius
R
and mass
M
. Since the linear equations of the theory of shells are used,
it is assumed that the mass makes small oscillations under the action
of external forces and
reaction of the shell. As the origin of the movable reference system related to mass, let us choose
the center of inertia of the body
O
and direct the axes
OC
OB
OA
,
,
along the main axes of mass
inertia (Fig. 2). Let us also introduce a stationary reference system
,
z
y
x
O
coinciding at the
starting point of time with the system.
Figure 2
The law of mass motion in vector form has the form of [8]:
;
0
F
F
,
0
K
K
L
(17)
ISSN 1607-2774
Вестник Государственного университета имени Шакарима города Семей № 4(92) 2020
121
где
− total body impulse;
L
− impulse moment;
0
F
и
0
K
− main vector and
main force moment
acting on the mass from the shell side;
F
и
K
− main vector and moment of external forces.
Equations (17) refer to a fixed coordinate
system and derivatives
and
L
represent a
change in time of vectors
and
L
in relation to this system. Meanwhile, the simplest relationship
between the components of solid state rotational moment
L
and angular velocity components
occurs in a moving coordinate system
.
OABC
Therefore we transform the equations of motion to
moving coordinates. For this purpose we apply the equation of transformation
of the time derivative
of an arbitrary vector
D
at transition from a stationary system to a rotating one:
.
D
dt
D
d
dt
D
d
тело
во
пространст
(18)
where,
− body angular velocity vector.
Due to the small amplitudes of mass oscillations and the striking nature of the system's
stimulation, it is possible to ignore the difference between the decomposition of any vector (and its
derivative in time) on the axes of the moving and stationary coordinate system. Then the law of
mass movement in vector form
takes the following form
;
0
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