, , . , .
(. 6.6, ), : i j (. 6.6, ).
, , `Mi 0 `Mj 0 (. 6.6, , ).
:
A 12 = rii θ ij + rji δ jj = rii 0 + rji 1 = rji.
, (3.15)
A 12 = W 12 = Sò(`Mi 0 `Mj 0/ EJ) ds,
:
rij = rji = Sò(`Mi 0 `Mj 0/ EJ) ds. (6.4)
(4.4) :
d ij = (`Mi 0 ´ `Mj 0) = Sò (`Mi 0 × `Mj 0 / EJ) ds,
, , (4.5):
D ip 0= (`Mi 0 ´ `Mp 0) = Sò (`Mi 0× `Mp 0 / EJ) ds.
: Rip 0 ≠ (`Mi 0 ´ `Mp 0), (`Mi 0 ´ `Mp 0) = 0.
, - i - (. 6.6, ), , k - (. 6.6, ).
zi =1 |
zj =1 |
Pk =1 |
Pk =1 |
zj =1 |
j |
i |
. 6.6
:
A 12 = rii θ ip + rji δ jp = rii 0 + rji 0 = 0,
A 12 = A 21 ,
A 21 = P d pi + rip θ ii = 0,
rip = d pi .
i- , k, .
.
, :
Rip 0 = S Pk d ki . (6.5)
, i- , , , .
A 12 = 0, A 12 = W 12 , : (`Mi 0 ´ `Mp 0) = W 12 = 0. , :
|
|
Rip 0 = (`Mi 0 ´ Mp 0) = Σ(`Mi 0 ´ Mp 0/ EJ) ds,
`Mi 0 - i - , Mp 0 . , , , . 6.6, .
, Rip 0 = 3 Pl /16 , . 6.4.
7.