, . - , .
dx Oxy, Ox , qx qy Ox Oy (. 1.20).
- :
(M, Q, N,);
(u, v, q);
(κ, g, e).
.
(. 1.20, ) :
dN / dx = qx; ü
dQ / dx = qy; ý (1.10)
dM / dx = Q. þ
, . 1.20, , :
κ = d q/ dx; ü
g = q - dv / dx; ý (1.11)
e = du / dx. þ
:
κ = M / EJ; ü
g = m Q / GF; ý (1.12)
e = N / EF; þ
E ;
G ;
F ;
J ;
m , .
Q > 0 |
γ>0 |
Q + dQ |
M > 0 |
N + dN |
qx > 0 |
qy > 0 |
u >0 |
θ>0 |
N > 0 |
M + dM |
θ+ d θ > 0 |
.1.20
, EJ EF (1.12) () .
(1.10) (1.12) :
1) M, Q, N (1.10), ;
2) .
:
M, Q, N, ;
u, v, q .
, (1.10) - (1.12), -. , :
, ( ) .
1. (1.10) . qx = const, S X = 0, :
|
|
N + qx × dx + (N + dN) = 0,
. (1.10) .
2. (1.12) :
κ = d q/ dx = d 2 v / dx 2 = M / EJ.
(m =1) :
t = Q / F = G g.
m , 3.5. (1.12) :
s = N / F = E ×e.
3. - Oxy , .