o método dos elementos de contorno aplicado à ... - Sistemas SET
o método dos elementos de contorno aplicado à ... - Sistemas SET
o método dos elementos de contorno aplicado à ... - Sistemas SET
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( )<br />
∫<br />
w, q + p*( q, P) u( P) dΓ( P)<br />
+<br />
kkj<br />
~ ~ ~<br />
Γ<br />
N c<br />
∑<br />
i=<br />
1<br />
( , ) ( )<br />
*<br />
p q P w P<br />
ci ci<br />
~<br />
*<br />
*<br />
= u ( q, P) p( P) dΓ( P)<br />
+ ∑ Rci P uci q, P +<br />
∫<br />
Γ<br />
~<br />
⎧<br />
T ⎪ ∂<br />
on<strong>de</strong>: w, kkj ( q)<br />
= ⎨<br />
~ ⎩⎪ ∂x<br />
⎡ ∂<br />
⎢<br />
⎢ ∂x<br />
p*( q, P)<br />
=<br />
⎢<br />
~<br />
∂<br />
⎢<br />
⎣⎢<br />
∂x<br />
~<br />
1<br />
1<br />
2<br />
N c<br />
i=<br />
1<br />
( ) ( )<br />
~<br />
∫<br />
Ω g<br />
2<br />
2<br />
⎛ ∂ wq ( ) ⎞ ∂ ⎛ ∂ wq ( ) ⎞ ⎫⎪<br />
⎜ ⎟ ⎜ ⎟ ⎬<br />
⎝ ∂xk∂xk ⎠ ∂x2⎝∂xk∂xk<br />
⎠ ⎭⎪<br />
2 ⎛ ∂ Vn<br />
⎜<br />
⎝ ∂x ∂x<br />
2 ⎛ ∂ Vn<br />
⎜<br />
⎝ ∂x ∂x<br />
=<br />
( ) Ω ( )<br />
∗<br />
gp ( ) w qpd , p<br />
g g<br />
~<br />
65<br />
(4.60)<br />
(4.61)<br />
2<br />
⎞ ∂ ⎛ ∂ M ⎞ ⎤<br />
n<br />
( qP , ) ⎟ − ⎜ ( qP , ) ⎟ ⎥<br />
⎠ ∂x<br />
1 ⎝ ∂xk∂xk ⎠ ⎥<br />
2 (4.62)<br />
⎞ ∂ ⎛ ∂ M ⎞ ⎥<br />
n<br />
( qP , ) ⎟ − ⎜ ( qP , ) ⎟ ⎥<br />
⎠ ∂x<br />
1 ⎝ ∂xk∂xk ⎠ ⎦⎥<br />
k k<br />
* *<br />
k k<br />
* *<br />
w<br />
u P { u P u P } w P<br />
n P<br />
T<br />
( ) = ( ) ( ) = ( ) ( )<br />
~<br />
⎧ ∂ ⎫<br />
1 2 ⎨ ⎬<br />
⎩ ∂ ⎭<br />
⎧<br />
* T ⎪ ∂<br />
pci ( q, P)<br />
= ⎨<br />
~ ⎩⎪ ∂x<br />
⎡<br />
∂<br />
⎢<br />
⎢ ∂x<br />
u*( q, P)<br />
= ⎢<br />
~<br />
⎢ ∂<br />
⎢<br />
x<br />
⎣⎢<br />
∂<br />
1<br />
2<br />
1<br />
2 * 2 *<br />
⎛ ∂ R ci ( q, P)<br />
⎞ ∂ ⎛ ∂ R ci ( q, P)<br />
⎞ ⎫⎪<br />
⎜<br />
⎟ ⎜<br />
⎟ ⎬<br />
⎝ ∂xk∂xk ⎠ ∂x2⎝<br />
∂xk∂xk ⎠ ⎭⎪<br />
2 ⎛ ∂ w<br />
⎜<br />
⎝ ∂x ∂x<br />
2 ⎛ ∂ w<br />
⎜<br />
⎝ ∂x ∂x<br />
⎞ ⎛ ⎛ w ⎞ ⎞<br />
( qP , ) ⎟ − ⎜ ⎜ ( qP , ) ⎟ ⎟<br />
⎠ x ⎜ x x ⎜ n ⎟<br />
⎝<br />
⎠<br />
⎟<br />
⎝<br />
⎠<br />
⎞<br />
w<br />
( qP , ) ⎟ ( qP , )<br />
⎠ x x x n<br />
−<br />
2 2<br />
∂ ∂ ∂<br />
⎤<br />
⎥<br />
∂ 1 ∂ ∂ ∂ ⎥<br />
⎥<br />
⎛ 2 2<br />
∂ ⎛<br />
⎞⎞<br />
⎜<br />
∂ ∂<br />
⎜<br />
⎟⎟<br />
⎥<br />
∂ ⎜ ⎜<br />
⎟<br />
⎝ ∂ ∂ ⎝ ∂ ⎠<br />
⎟ ⎥<br />
2<br />
⎠ ⎦⎥<br />
* *<br />
k k k k<br />
* *<br />
k k k k<br />
{ } { }<br />
T<br />
p ( P) = p ( P) p ( P) = V ( P) M ( P)<br />
~<br />
(4.63)<br />
(4.64)<br />
(4.65)<br />
1 2 n n<br />
(4.66)<br />
2 * 2 *<br />
⎧ w<br />
w<br />
* T ⎪ ∂ ⎛ ∂ ⎞<br />
ci<br />
∂ ⎛ ∂ ⎞ ⎫<br />
ci ⎪<br />
uci ( q, P)<br />
= ⎨ ⎜ ( qP , ) ⎟ ⎜ ( qP , ) ⎟ ⎬<br />
~ ⎩⎪ ∂x<br />
1 ⎝ ∂xk∂xk ⎠ ∂x<br />
2 ⎝ ∂xk∂xk ⎠ ⎭⎪<br />
2 * 2 *<br />
⎧ w<br />
w<br />
* T ⎪ ∂ ⎛ ∂ ⎞ ∂ ⎛ ∂ ⎞ ⎫<br />
wg( q, P)<br />
= ⎜ ( qP , ) ⎟ ⎜ ( qP , ) ⎟<br />
⎪<br />
⎨<br />
~<br />
x ⎜<br />
⎝ xk x ⎟<br />
k ⎠ x ⎜<br />
⎝ xk x ⎟ ⎬<br />
∂ ∂ ∂<br />
∂<br />
⎩⎪ 1<br />
2 ∂ ∂ k ⎠ ⎭⎪<br />
(4.67)<br />
(4.68)<br />
on<strong>de</strong> as <strong>de</strong>rivadas <strong>dos</strong> <strong>de</strong>slocamentos e esforços fundamentais estão <strong>de</strong>fini<strong>dos</strong> no item<br />
(3.2.1).<br />
Após a discretização do <strong>contorno</strong> e a aproximação das variáveis, os valores <strong>de</strong> w, kkj<br />
em Ni pontos internos são calculadas através da equação: